The rear side of a truck is open and a box of 40kg mass is placed 5m away from the open end as shown in the figure. The coefficient of friction between the box and the surface below it is 0.15. On a straight …

Three man A,B&C of mass 40kg,50kg&60 kg are standing on a plank of mass 90 kg which is kept on a smooth horizontal plane. If A&C exchange their positions then mass B will shift.

A 40 kg slab rests on a frictionless floor. A 10 kg block rests on top of the slab. The static coefficient of friction between the block and the slab is 0.60 while the kinetic coefficient is 0.40. The 10 kg block is …

An object of Mass 40 kg is raised to a height of 5m above the ground what is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half way down.

Q 1 Center of mass of three particles 10kg,20kg,30kg is at (0,0,0). Where should a particle of mass 40kg be placed so that the combined center of mass will be at (3,3,3)?

A dog of mass 10kg is standing on a flat 10m long boat so that it is 20 meters from the shore. It walks 8m on the boat towards the shore and then stops. The mass of the boat is 40kg and friction between …

A 40kg boy whose leg bones are 4cm2 in area and 50cm long falls through a height of 50cm without breaking his leg bones. If the bones can stand a stress of 0.9×108N /m2.

Two persons A and B of weight 60kg and 40kg respectively stand facing each other, and pull on a light rope stretched b/w them . Find the ratio of distance covered by them when they meet if their initial …

A boy having mass equal to 40kg is standing in an elevator.the force felt by the feet of the boy will greater when the elevator accelerates upwards with an acceleration equal to 4m/sec² Was this …

Two bodies having same mass 40kg are moving in opposite directions, one with a velocity of 10m/s and the other with 7m/s. If they collide and move as one body, the velocity of the combination is 3m/s …