Question

1. How much work is done in lifting an 8-kg box
from the floor to a height of 2m above the
floor?

Answer 1

Answer:

156.8 Joules

Explanation:

Work = Force x Displacement

Displacement = 2m

Force (force of gravity) = mass x acceleration due to gravity =  8Kg x 9.8m/s^2

= 78.4N

Work = FxD

Work = 78.4 N x 2m

Work = 156.8 N·m  OR 156.8 Joules

Answer 2

The amount of work done in lifting this box is equal to 156.8 Joules.

Given the following data:

• Mass = 8 kilograms.

• Displacement = 2 meters.

Scientific data:

• Acceleration due to gravity = 9.8 $m/s^2$

To calculate the amount of work that is done in lifting this box:

How to calculate work done.

Mathematically, the work done by a person is calculated by using this formula:

$Work\;done = Fd = mgd$

Where:

• F is the force.

• d is the displacement.

• m is the mass.

Substituting the given parameters into the formula, we have;

$Work\;done = 8 \times 9.8 \times 2$

Work done = 156.8 Joules.

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