Question

A book with a mass of 1kg is on the floor.if the book is lifted from the floor to the top shelf which is 2 meters from the floor,how much work is done on the book?

Answer 1

W = F * d

Work = Force * Distance.

F = mass * gravitational acceleration

mass = m = 1 kg

gravitational acceleration = 9.8 m/s^2

d = 2 meters.

F = 1 * 9.8

F = 9.8 N

Work = 9.8 N * 2 m

Work = 19.6 Nm or 19.6 Joules