A 1-kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force that acts on the stone when it is halfway to the top of its path is about
A)1/2 N.
B)1 N.
C)5 N.
D)7.5 N.
E)10 N.

Question

Quizplus · Accepted Answer

The net force acting on the ball at any point in its trajectory (ignoring air resistance) is due to gravity alone, which can be calculated using F = ma, where m is the mass (1 kg) and a is the acceleration due to gravity (approximately 9.8 m/s^2). This gives a force of roughly 9.8 N, which rounds to 10 N.

A 1-Kg Ball Is Thrown at 10 M/s Straight Upward