A girl lifts a ball by means of a string attached to the ball. The string exerts a 30 newton force on the ball. The ball weighs 20 newtons and has a mass of 2 kilograms. The acceleration of the ball is A) 25 m/s². B) 15 m/s². C) 5 m/s². D) zero. E) 10 m/s².

Question

Quizplus · Accepted Answer

The net force on the ball is 10 N (30 N upward force - 20 N weight). Using F = ma, the acceleration is 10 N / 2 kg = 5 m/s².

A Girl Lifts a Ball by Means of a String