Kinematics Questions and Answers

g 10m 2 From the top of a tower 49 m high a ball is thrown with a velocity of 29 4 m s at an elevations 30 with the horizontal When where and with what velocity will it strike the grous g 9 8 m s 5 s after 127 5 m from foot of tower 42 74 m s at 53 24 with he boleht falls to

If equations of a projectile projected at angle 8 with horizontal are following x 15t m y 15t5t m where x and y are co ordinates then the initial velocity is given by X 15 m s 15 2 m s 30 m s 20 m s

g 9 8 m s 43 6 m s 7 6 with horizonta 2 A projectile is fired at an angle of 30 with the horizontal so that the initial vertical velocity 80 m s If T be the time of flight of the projectile what is the velocity at time t T 4 144 m s 16 6 with hom

An aeroplane takes flight from a place towards another place in a direction eN of E in a strong wi of velocity U to the west The speed of plane in still air is V Distance between the two places is L 13 If T T are time of travel of on ward and return journey then T T 2 90 a L u u b 10 c 21 v 4 FLITE SER d L 2 v u

Two projectiles A and B are projected simultaneously as shown in figure in same vertical plane then 20 m s A 37 50 m 15 m s 53 Path of A seen by B is straight line B Path of B seen by A is a parabolic A and B collide at t 2 s A and B collide at t 5 s

A particle moves in a straight line with the velocity as shown in figure At t 0 x 16 m Av m s 6 2 0 6 10 18 24 30 40 t s The maximum value of the position coordinate of the particle is 54 m The maximum value of the position coordinate of the particle is 36 m The particle is at the position of 36 m at t 18 s The particle is at the position 78 m at t 30 s

b 41 2J c 41 21 2J 12 There are two incline planes AO and OB inclined at 45 and 60 respectively with the horizontal shown in the figure When a man moves on the incline plane AO with speed 10 m s he observes t the rain drops are falling 45 with the vertical When the man moves on the inclined plane OB w speed 20 m s he observes that the raindrops are falling vertically downward Then actual speed rain is a 5 2m s 450 20 m s 10 m s 60 B vertical horizonal b 20 2m s c 10 2m s Linked Comprehension Type Questions d d None of these

the point of projection Calculate 1 the initial velocity 2 time of flight 3 maximum altitude 4 velocity at the point of maximum altitude 204 m s 23 9 s 698 5 m 167 m s A body is projected from the ground level with a velocity of 50 m s at an angle of 30 with the horizontal Determine the direction and magnitude of its velocity 2 seconds after projection 76 with horizont

Assertion A When a body is dropped or thrown horizontally from the same height it His would reach the ground at same time Reason R 7 Horizontal velocity has no effect on the vertical direction AIIMS 2012

No 28 View in English Width of a river is 60m A swimmer wants to cross the river such that he reaches from A to B directly Point B is 45m ahood of line AC perpendicular to river Assume spood of river and speed of swimmer as equal Swimmer must try to swim at angle 9 with line AC Value of 8 is 1 2 Correct Answer 4 Your Answor 1 Status incorrect 37 53 30 16 B 7 River Flow

A particle moves in a straight line along x axis Its position x varies with time t as x 2 5t 6 where all quantities are in Sl units Then Average velocity in first 3 s is 1 m s Velocity at t 3 s is 7 m s Particle comes to rest at t 1 s Average acceleration in first 3 s is 4 m s

A particle is projected with a speed of 50 m s at an angle of 37 with the horizontal from the top of a tower Then select the correct statement s 3 Equation of trajectory of a particle is y x x 320 25 Paticle moves perpendicular to initial direction at 3 if origin is taken at the point of projection sec Minimum speed of particle in subsequent motion is zero Maximum height attained by the particle from the point of projection is 45 m

The acceleration time graph of a particle moving along straight line is shown in figure Initial velocity is zero a m s3 2 Maximum velocity is 4 m s 5 Maximum velocity is 10 m s t s Average acceleration during t 0 to t 5s is 2 m s 8 Distance covered in first 2 s is m

A ball is projected from origin with speed 20 m s at an angle 30 with x axis If x coordinate of the ball at the instant when the velocity of the ball becomes perpendicular to the velocity of projection will be 40 k m then find k

Two particles A B are projected as shown in fig in x y plane Under the effect of force which provide a constant acceleration a 11 m s in negative y direction Then match situation in column I with the corresponding results in column II All positions are given in metre VAB velocity of A w r t B TAB Position of A w r t B A B C D y A 0 0 10 m s 537 20m s 53 X 20 5 Column l Column II Separation between the two particles is minimum at sec Minimum separation between the two particles is Time when velocities of both particles are perpendicular each other at sec At the time of minimum separation VAB TAB m p 0 q 0 5 r 0 9 s 2 t 2 5

A projectile is launched from a point on a horizontal plane with a speed 102 making an angle 60 with the horizontal If interval of time between two instants when the kinetic energy of projectile is equal to its potential energy is s then find the value of n Take reference as the horizontal level g 10 m s

A particle dv a dt zero then moves in a straight line according to the equation by where a and b are constants Initial velocity is Final velocity is Final velocity is a Velocity as function of time is e e bt a

If the ball returns back to the initial point after striking ground wall and again ground Assume no change in speed of the ball due to collision from wall and ground The time taken in it Take acceleration due to gravity g 10 m s g 5m

A particle is thrown from a point on an incline plane with a velocity of 20 m s at an angle of 60 with the horizontal angle of k inclined plane is 30 If after time At S velocity of the projectile becomes parallel to the incline plane then find value of k 20 m s 60 30

Two balls are thrown one from a cliff a nd one from below How long will they t ake to collide if they do What will be t he height of collision What must be th e minimum velocity of the bottom ball f or a collision to happen

An elevator cage is going up with a velocity of 6 m s When the cage was 36 m above the bottom of the shaft a bolt gets detached from the bottom of the cage floor Find the velocity with which the bolt strikes the bottom of the shaft and the time that elapses

A block of mass 25 kg rests on a horizontal floor m 0 2 It is attached by a 5m long horizontal rope to a peg fixed on floor The block is pushed along the ground with an initial velocity of 10 m s so that it moves in a circle around the peg Choose the correct statement s 5m Magnitude of tangential acceleration of the block is 2 m s Speed of the block at time t 1 sec is 8 m s Time when tension in rope becomes zero is 5 sec Friction force acts towards centre of the circle

Two car s A and B are moving with a speed of 15 m s and 5 m s and acceleration of the car is m s and 6 m s respectively Then the minimum seperation between them is A 5 m B 10 m 15m s a 1m s 20m B C Zero 5m s a 6m s D None

A boat has a speed of 10 m s in still water With this boat a person wants to cross the river from point A There is another point B on the other bank as shown The river velocity is 5 m s and width is 100 m B A If velocity of boat relative to water is perpendicular to the river bank then it reaches 50 m upstream of B B If velocity of boat relative to water is along AB it reaches 50 2 m downstream of B C Minimum time to cross the river is 10 s D If the river has to be crossed along the shortest path boat velocity relative to river should make an angle of 120 with river velocity

Two particles are located on a horizontal plane at a distance 60 m Both are simultaneously projected at angle 45 with velocities 2ms and 14 ms respectively as shown Find the value of y if minimum separation between them during motion is 6y u 2m s 45 60m B Ru 14m s 45

SECTION 1 Intener Value Tvne Read More A bullet loses of its velocity passing 16 through a plank Assuming resistive force is

Refer to the figure of projectile motion along the inclined plane The speed of the particle when its velocity becomes parallel to the inclined plane is k 3 1 m s find the value of k u 10 m s 130 45

7 A material particle is chasing another one and both of them are moving on the same straight line After they pass a particular point their velocities u vary with time t as shown in the figure When will the chase end a 4 0 s c 12 s 8 Two cars A and B simultaneously start a race Velocity v of the car A varies with time t according to the graph shown in the figure It acquires a velocity 50 m s few seconds before t 100 s and thereafter moves with this speed Car B runs together with car A till both acquire a velocity 20 m s after this car B moves with zero acceleration for one second and then follows velocity time profile identical to that of A with a delay of one second In this way car B acquires the velocity 50 m s one second after A acquires it How much more distance As does the car A cover in the first 100 s as compared to the car B a As 30 m c As 20 m b 6 0 s d Insufficient information Add your responses Asked by 2444466 aesl id Standard XI Stream JEE Jul 26 2021 at 9 49 PM Type Text b As 30 m d Insufficient information Type your answer here OR you can upload an attachment from the option below

In the arrangement shown by what acceleration in ms 2 the boy of mass 50kg must go up so that 150kg block remains stationary on the wedge The wedge is fixed and friction is absent everywhere Take g 10 m s 150 kg 370 Im m 50 kg

1 Two projectiles are launched from a building of height h as shown in the figure One is launched at angle 0 above horizontal and the other at an angle 0 below horizontal Both the projectiles have same initial speed u Which of the following is are correct TE A The difference in the times of flight for these two projectiles is 2u sin 0 B The horizontal distance between these two projectiles when they reach the ground is 2u sin cos 0 g C They have same speed when they reach the ground m TCC

A shot putter with a mass of 80 kg pushes the iron ball of mass of 6 kg from a standing position accelerating it uniformly form rest at an angle of 45 with the horizontal during a time interval of 0 1 seconds The ball leaves his hand when it is 2m high above the level ground and hits the ground 2 seconds later g 10m s The horizontal distance between the point of release and the point where the ball hits the ground

A projectile is thrown on inclined plane as shown in the figure Tangent of angle of projection 6 with respect to inclined plane when range on inclined plane is maximum is x The value of Xo 3 is 60

A space traveler about to for the moon has a spring bala and a 2 kg mass A which when hung on the balance on the Earth gives the reading of 20 N Arriving at moon he picks up a stone B which gives a reading of 20 N when weighed on the spring balance He then hangs A and B over a pulley as shown in the figure The mass of stone B is 6kg The acceleration of B is 10 A m s B 5 m s B A C 5 m s 2010 5 m s

A projectile is projected from origin having vertical as y axis The position of particle is given by x 6t and y 8t 5t2 where x and y are in meter If angle of projection in degree to nearest integer is k 50 then find k

A projectile strikes the inclined plane perpendicularly as shown in the figure Which of the following statements is are correct O a A Just before striking the inclined plane component of final velocity of particle parallel to the inclined plane is non zero B Initial and final velocities are perpendicular to each other C Component of acceleration of particle parallel to the inclined plane before striking the plane is zero D Component of acceleration of particle perpendicular to the inclined plane before particle strikes the plane is less than acceleration due to gravity

120 B Figure shows a particle starting from point A travelling upto B with a speed S then upto point C with a speed 2S and finally upto A with a speed 3S then its average speed for complete motion is 1 1 2 S 2 1 8 S 3 28

A particle A is thrown with initial velocity 5 m s along a frictionless inclined plane of inclination B Another particle B is thrown with initial velocity 10 m s at an angle a with the horizontal at the same moment when A is thrown Both the particle meet again on the inclined plane The of a is value of b B B

A particle moves in rectilinear motion The acceleration position graph is shown in the figure Initial velocity of the particle is 10m s Velocity of the particle after the particle has traveled 30m is x 10 m s a m s 10 15 30 s m

A particle moves along a straight line such that its displacement at any time t is given by s t 6t 3t 4 metres The magnitude of velocity in m s when rate of change of velocity is zero is The ratio of x and y component of vector F is

A projectile is thrown horizontal from height h as shown in the figure v horizontal component of velocity v vertical component of velocity y x horizontal position y vertical position A Which of the following graphs is are correct t origin h B r X X KK E C D Parab

Identical guns fire identical bullets horizontally at the same speed from the same height above level planes one on the Earth and one on the Moon Value of g on moon is 1 6 of value of g on earth Which of the following three statements is are true 1 The horizontal distance travelled by the bullet is greater for the Moon II The flight time is less for the bullet on the Earth III The velocities of the bullets at impact are the same O III only O I and II only O I and III only II and III only

1 A ball is projected from the ground at an angle of 45 with the horizontal surface It reaches a maximum height of 120 m and returns to the ground Upon hitting the ground for the first time it loses half of its kinetic energy Immediately after the bounce the velocity of the ball makes an angle of 30 with the horizontal surface The maximum height it reaches after the bounce in metres is

In river crossing to acheive minimum drifting Which among the following is correct Consider V is the velocity of men is the velocity of river and 0 the angle with line joining bank to bank a Cos 0 b c sin 0 cos0 V V V 3

A stone is dropped from the top of a tower of height 400 m and at the same time another stone is projected upward vertically from the ground with a velocity of 100 m s Find time elapsed in seconds when two stones meet or crosses each other

b 1 0 cm c 3 0 cm d 2 0 cm A particle starts its motion from rest under the action of a constant force If the distance covered in first 10 seconds is S and that covered in the first 20 seconds is S then c S 4S b S 3S d S S 2 The distance travelled by a particle starting from rost and a S 2S 2 Y

Two identical rings are free to move over a smooth horizontal rod as shown in the figure The velocity of the left ring when the point mass m reaches in its m s Find n lowest position and string is taut is g 10 m s m m 1m2 m m Correct answer 40 V3

A massless rod is pivoted at point O A string carrying a mass m at one end is attached to the point A on the rod m 1kg a 1m b 2m k 4N m k 000000 b The period of small vertical oscillation of mass m around its equilibrium position is A a m

5 A particle starts from rest and travels a straight distance of 18 m The first half of the distance is covered with a uniform acceleration of 2 ms 2 while the second half is covered with a uniform acceleration of 2 5 ms 2 The total time taken for the journey is a 4 2 s b 3 6 s c 5 s d 3 s

A particle is projected horizontally with a speed u from the top of a long inclined plane of inclination angle to horizontal The time after which it strikes the incline is A B 2 sec 0 D 2u tan C 2u sin 2u COSA

A cyclist starts from the centre O of a circular park of radius one kilometre reaches the edge P of the park then cycles along the circumference and returns to the centre along QO as shown in the figure If the round trip takes ten minutes the net displacement and average speed of the cyclist in metre and kilometre per hour is a 0 1 b 4 2 2 0 L P c 21 4 T 4 2 2 d 0 21 4