Question

What is the magnitude of the force of gravity that is exerted on a 15kg box at rest. Assume no other forces are acting on the box.

Question 3 options:

A. 15N

B. 9.8N

C. 147N

D. 147m/s2

Answer 1

Answer:

Correct choice: C. 147 N

Explanation:

Weight

Weight is the force exerted on a body by gravity. It's often expressed with the formula:

W = mg

Where

W = weight

m = mass of the object

g  = gravitational acceleration.

The mass of the box is m=15 Kg and the acceleration of gravity is $g=9.8\ m/s^2$, thus:

W = 15*9.8 = 147 N

W = 147 N

Correct choice: C. 147 N