A heavy box is slid across a rough floor with an initial speed of 4 m/s. It stops moving after 8 seconds. If the average resisting force of friction is 10 N, the mass of the box (in kg) is

A 5 kg box is moving straight across the floor at a constant speed by a force of 30 N as shown in figure a. How large a friction force impends the motion of the box ? b. Find mu_(k) between the box and the floor

A 5 kg box is moving staright across the floor at a constant speed by a force of 30 N as shown in figure a. How large a friction force impends the motion of the box ? b. Find mu_(k) between the box and the floor

A bullet of mass 40 g moving with a speed of 90 m/s enters a heavy wooden, block and is stopped after a distance of 60 cm. The average resistive force exerted by the block on the bullet is

A bullet of mass 0.05 kg moving with a speed of 80m//s enters a wooden block and is stopped after a distance of 0.40 m The average resistive force exerted by the block on the bullet is:

A box of mass 20kg is pushed along a rough floor with a velocity 2 m/s and then let go .The box moves 5m on the floor before coming to rest. What must be the frictional force acting on the box? " (1) 4N (2) 2N (3) 20N (4) 8N

A box is pushed through a distance of 4 m across a floor offering 100n resistance. How much work is done by the resisting force ?