Question

a ball is launched at an angle of 45° above the horizontal. which statement best describes how the balls horizontal and vertical motions behave during its flight? a both horizontal and vertical motions increase due to gravity. b the horizontal motion stays constant, and the vertical motion changes due to gravity. c the vertical motion stays constant, but the horizontal motion decreases due to air resistance. d both horizontal and vertical motions stay constant.

Explanation:

In projectile - motion (assuming no air - resistance), the horizontal motion is a uniform motion with constant velocity because there is no horizontal force acting on the ball. The vertical motion is a uniformly - accelerated motion due to the gravitational force acting downwards.

Answer:

B. The horizontal motion stays constant, and the vertical motion changes due to gravity.