A ball is thrown up in the air with a velocity v at an angle 45 $\circ$ with respect to the ground.At the very top of its motion the y-component of the acceleration will be
A)zero.
B)-g
C)g.
D)g/2.
E)-g/2.

Question

Quizplus · Accepted Answer

At the top of its motion, the only acceleration acting on the ball is due to gravity, which is downward at -g (9.8 m/s^2). The horizontal (x) component of velocity does not affect the vertical (y) component of acceleration.

A Ball Is Thrown Up in the Air with a Velocity