Question

What is the work done to hold an 15 kg block at rest 0.8 meters above the ground?

Answer 1

The work done to hold a 15 kg block at rest 0.8 meters above the ground is approximately 117.6 Joules, calculated using the formula W = mgh, where m is mass, g is gravity, and h is height.

The work done W to hold a block at rest above the ground is given by the equation:

W = mgh

where:

- m is the mass of the object (15 kg),

- g is the acceleration due to gravity (approximately 9.8 m/s^2,

- h is the height above the ground (0.8 meters).

Substitute the values into the formula:

`\[ W = (15 \ \text{kg}) * (9.8 \ \text{m/s}^2) * (0.8 \ \text{m}) \]\[ W \approx 117.6 \ \text{Joules} \]`

So, the work done to hold the 15 kg block at rest 0.8 meters above the ground is approximately 117.6 Joules.