Question

Marie lifts a 5 kg mass from the floor and puts in on a table one metre high. What is the work done?

Answer 1

Answer:

The work done was 49.05 N*m.

Explanation:

The work done by a a force is given by:

$W = F*d$

We first need to calculate the force necessary to lift the box from the ground, the force needed for is the weigh of the box, which is shown below:

$F = m*g\\F = 5*9.81\\F = 49.05 \text{ N}$

Therefore the work done by lifting the box and placing it on the table is:

$W = 49.05*1 \\W = 49.05 \text{ N*m}$

The work done was 49.05 N*m.