A ball is moving at 20 m/s. If no forces act on it, then 5 seconds later the ball's speed will be
A) zero.
B) 20 m/s.
C) more than 20 m/s, but the precise answer cannot be found without further information.
D) less than 20 m/s, but the precise answer cannot be found without further information.
E) None of the above.

Question

Quizplus · Accepted Answer

According to Newton's first law of motion, an object in motion will continue at the same speed and in the same direction unless acted upon by an external force. Since no forces are acting on the ball, its speed will remain 20 m/s.

A Ball Is Moving at 20 M/s