with respect to the first as shown in the figure The
Last updated: 6/8/2023
with respect to the first as shown in the figure The equation of the linear part is by jm 120 100 80 60 40 2 a x x 501 c x x 15t 4 6 Ms N 16 b x x 10t d x x 201 a 15 km h c 60 km h RELATIVE VELOCITY 83 A ball A is dropped from a building of height 45 m Simultaneously another identical ball B is thrown up with a speed 50 ms The relative speed of ball Bw rt ball A at any instant of time is Take g 10ms a 0 b 10 ms d 50 m s c 25 m s 84 A ball A is thrown vertically upwards with speed u At the same instant another ball B is released from rest at height At time t the speed of A relative to Bis a u b u 2gt c u 2gh d u gt 85 Two cars A and B are running at velocities of 60 km h and 45 km h What is the relative velocity car B if both are moving of car A with respect to eastward b 45 km h d 105 km h 86 In question number 85 what is the relative velocity of a car A with respect to car B if car A is moving eastward and car B is moving westward a 15 km h b 45 km h 1 c 60 km h d 105 km h 87 On a two lane road car A is travelling with a speed of 36 km h Two cars B and C approach car A in opposite directions with a speed of 54 km h each At a certain instant when the distance AB is equal t AC both being 1 km B decides to overtake A before C does The minimum required acceleration of car B to avoid an accident is a 1 ms 2 c 2 ms 2 b 1 5 ms2 d 3 ms 88 A bird is tossing flying to and fro between two cars moving towards each other on a straight road One car has speed of 27 km h while the other has the speed of 18 km h The bird starts moving from first 39 car towards the other and is moving with the speed of 36 km h when the two cars were separated by 36 km The total distance covered by the bird is a 28 8 km c 48 8 km b 38 8 km d 58 8 km 89 A police van moving on a highway with a speed of 30 km h fires a bullet at a thief s car speeding away in the same direction with a speed of 192 km h If the muzzle speed of the bullet is 150 m s with what speed does the bullet hit the thief s car a 95 ms c 115 ms 90 A bus is moving with a speed of 10 m s on a straight road A scooterist wishes to overtake the bus in 100 s If the bus is at a distance of 1 km from the scooterist with what speed should the scooterist chase the bus a 40 m s c 10 ms b 105 m s d 125 ms b 25 m s d 20 m s 91 Two towns A and B are connected by a regular bus service with a bus leaving in either direction every T minutes A man cycling with a speed of 20 km h in the direction A to B notices that a bus goes pasti him every 18 min in the direction of his motion and every 6 min in the opposite direction The period T of the bus service is a 4 5 min c 12 min a 35 s c 11 6 s b 9 min d 24 min 92 A 175 m long train is traveling along a straight track with a velocity 72 kmh A bird is flying parallel to the train in the opposite direction with a velocity 18 kmh The time taken by the bird to cross the train is b 27 s d 7 s 93 Two parallel rail tracks run north south On one track train A moves north with a speed of 54 km h and on the other track train B moves south with a speed of 90 km h The velocity of train A with respect to train Bis a 10 m s c 25 m s b 15 m s d 40 m s 94 In the question number 93 what is the velocity of a monkey running on the roof of the train A against its motion with a velocity of 18 km h with respect to the train A as observed by a man standing on the ground a 5 ms c 15 ms b 10 m sl d 20 m s 95 A train A which is 120 m long is running with velocity 20 m s while train B which is 130 m long is