Susan s 11 0 kg baby brother Paul sits on a mat Susan pulls

33 A force F i 47 acts on block shown The force of friction acting on the block is y a i c 2 4i X 1 kg 0 3 b 1 8 d 3 F

The driver of a bus travelling with a speed v suddenly observes a wall in front of his bus at a distance a Father of this driver who was also a driver had advised him to take a circular turn to avoid hitting in such a situation However the driver in question decides otherwise by using his own wisdom He applies brakes as hard as possible without taking a circular turn then 1 he is more likely to hit the wall 2 he is less likely to hit the wall 3 he is as likely to hit the wall 4 none of the above

A body starts from rest on a long inclined plane of slope 45 The coefficient of fiction between the body and the plane varies as 0 3 x where x is the distance travelled down the plane The body will have maximum speed for g 10 m s when x 1 9 8 m tang M 2 12 m 3 12 m 4 3 33m tan 45 0 3x x 100 2013

A block is placed on a rough horizontal plane A time dependent horizontal force F kt acts on the block where k is a positive constant The acceleration time graph of the block is JEE Main ONLINE 2013 14 2 3 D 4

0 278 A truck is carry a box of mass m 50 kg on its flat horizontal rough surface with coefficient of friction 0 3 It is crossing a circular track of radius 27 m What is the maximum speed of the truck so that the box does not slide from the truck while moving on the circular path m 1 18 km hr 3 32 4 km hr R 2 36 km hr 4 None of these

3 Two bodies of masses 1 Kg and 2 Kg a connected by a metal wire shown in figur force of 10N is applied on the body of mas Kg The breaking stress of metal wini 2x10 Nm The minimum radius of the sin used if it is not to break IKg 1 0 23x10 m EKGF 10N 2 4x10m

On the horizontal surface of a truck a block of mass 1 kg is placed 0 6 and truck is moving with acceleration 5 m s then the frictional force on block will be A 5N B 6N C 5 88N D 8N

67 If coefficient of friction between all surfaces is 0 4 then find the minimum force F to have equilibrium of the system Take g 10 ms a 62 5 N c 135 N Wall 25 kg VI 15 kg F b 150 N d 50 N

A cord passing over a pulley connects two masses as shown where m 3 10 kg and m 6 00 kg The system accelerates with a magnitude of 0 97 m s2 The coefficient of kinetic friction between the masses and the incline is the same for both masses Assume the pulley is frictionless and the cord is massless Due to the nature of this problem do not use rounded intermediate values in your calculations including answers submitted in WebAssign m 35 0 m 35 0 a What is the coefficient of kinetic friction b What is the tension in N in the cord N

A body of mass 2 kg is lying on a rough inclined plane of inclination 30 Find the magnitude of the force parallel to the incline needed to make the block move a up the incline b down the incline Coefficient of static friction 0 2 7 Repeat part a of problem 6 if the push is applied horizontally and not parallel to the incline