A rock is thrown upwards at an angle of 40° with respect to the horizontal. As the rock is rising in its trajectory, the vertical component of its velocity
A) increases.
B) decreases.
C) remains the same.
D) is zero.
E) Cannot be determined without additional information.

Question

Quizplus · Accepted Answer

As the rock is rising, it is moving against the force of gravity, so its vertical component of velocity is decreasing. At the highest point of the trajectory, the vertical component of velocity is zero before it starts to fall back down to the ground.

A Rock Is Thrown Upwards at an Angle of 40°