Question

At a construction site, a brick with a mass of 1.5 kg is perched 30.5 m above the ground. What is the brick’s potential energy?

a. 459.45 J
b. 143.625 J
c. 30.5 J
d. 0.015 J

Answer 1

The potential energy of the brick can be calculated using the formula Potential Energy = mass x gravitational acceleration x height. So, the potential energy of the brick is 445.35 J.

Step-by-step explanation:

The potential energy of an object can be calculated using the formula:

Potential Energy = mass x gravitational acceleration x height

In this case, the mass of the brick is given as 1.5 kg and the height is given as 30.5 m. The gravitational acceleration can be taken as 9.8 m/s².

So, the potential energy of the brick is:

Potential Energy = 1.5 kg x 9.8 m/s² x 30.5 m = 445.35 J

Therefore, the correct answer is a. 459.45 J.