Lesson: Newton's Second Law of Motion

A cell phone is at rest on a tabletop and the phone’s owner flicks the phone with their fingers, which applies a 0.01 N force to the phone. The phone is accelerated at a rate of 0.1 m/s² in the direction of the flick. What is the mass of the phone?

A cup of mass 125 g is at rest on a desk when it is accidentally knocked by a person’s arm. The cup accelerates in the direction that it is pushed at a rate of 0.25 m/s². How much force is applied by the arm that knocks the cup? Give your answer to two significant figures.

An object of mass 1.5 kg has a force of 4.5 N applied to it. At what rate does the force accelerate the object?