Question

How much work is done on a 3.0 kg book that is pushed across the top of a table to the other side until it stops? Its initial speed is 1.4 m's.

Answer 1

Work down = 2.94 N

Step-by-step explanation:

Given:

Mass of book m = 3 kg

Initial speed v = 1.4 m/s

Find:

Work down w

Computation:

Work down = Kinetic energy

SO,

Work down = 1/2(m)(v)²

Work down = 1/2(3)(1.4)²

Work down = 2.94 N