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) 7.5 N.
B) 1 N.
C) 1/2 N.
D) 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). Thus, F = 1 kg * 9.8 m/s^2 = 9.8 N, which is approximately 10 N.

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