Suppose the lifeboat slides halfway to the water, gets stuck for a moment, and then starts up again and continues to the end
of the ramp. What is the work done by gravity in this case?

What happens to light waves from a star as the star moves away from earth?

Abody of weight 60 kg is standing in a lift the lift going upward with a uniform velocity of 4.9 metre per second slows down and stops in two seconds then apparent weight of the body during the slow down process is

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of