Question

find the increase in kinetic energy of a body of mass 700 kg when its speed increases​

Answer 1

Answer:

Kinetic Energy (From The Sciences, 6th ed., by Trefil and Hazen)

Think about a cannonball flying through the air. When it hits a wooden target, the ball exerts a force on the fibers in the wood, splintering and pushing them apart and creating a hole. Work has to be done to make that hole; fibers have to be moved aside, which means that a force must be exerted over the distance they move. When the cannonball hits the wood, it does work, and so a cannonball in flight clearly has the ability to do work—that is, it has energy—because of its motion. This energy of motion is what we call kinetic energy.

You can find countless examples of kinetic energy in nature. A whale moving through water, a bird flying, and a predator catching its prey all have kinetic energy. So do a speeding car, a flying Frisbee, a falling leaf, and anything else that is moving.