A constant force is applied to a body that is already moving. The force is directed at an angle of 60 degrees to the direction of the body's velocity. What is most likely to happen is that
A) the body will stop moving.
B) the body will move in the direction of the force.
C) the body's velocity will increase in magnitude but not change direction.
D) the body will gradually change direction more and more toward that of the force while speeding up.
E) the body will first stop moving and then move in the direction of the force.

Question

Quizplus · Accepted Answer

When a constant force is applied at an angle to the direction of motion, it has two components: one along the direction of motion that changes the speed, and one perpendicular to it that changes the direction. Over time, this causes the body to gradually change its direction towards the force while its speed increases.

A Constant Force Is Applied to a Body That Is