Question

1. a block initially at rest on a horizontal, frictionless surface is accelerated by a constant horizontal force of 10.0 newtons. if 20 joules of work are done on the block by this force while accelerating it, how much does the kinetic energy of the block increase by?

Explanation:

Step1: Recall Work - Energy Theorem

The work - energy theorem states that the work done on an object is equal to the change in its kinetic energy, i.e., \(W=\Delta KE\).

Step2: Substitute the given value of work

We are given that the work done \(W = 20\) joules. According to the work - energy theorem, the change in kinetic energy \(\Delta KE\) is equal to the work done on the object.

Answer:

The kinetic energy of the block increases by 20 joules.