A boulder tumbles off a cliff. It accelerates at the rate of the gravitational constant for Earth, 9.8 m/s². It hits the ground with a force of 91,590 N. What is the mass of the boulder?

Question

Quizplus · Accepted Answer

The formula to find the required force is force = mass in kg × acceleration in m/s². F=ma To find the mass of an object we must isolate mass. To do this, we divide both sides by the acceleration F/a = ma/a F/a = m Then we plug in the numbers from the problem. 91590 N / 9.8 m/s² = 9345.9 kg which rounds to 9346 kg Mass is always positive.

A Boulder Tumbles Off a Cliff