Question

A ball is projected horizontally from the top of a cliff on the surface of earth with speed 40 m/s. Assume that there is no air resistance, what will its speed be 3s later?

Answer 1

Since there is no air resistance, the horizontal component of the ball's velocity remains constant throughout its motion. In this case, the initial horizontal velocity is 40 m/s, and it will remain the same after 3 seconds.

Therefore, the horizontal speed of the ball will be 40 m/s after 3 seconds, assuming there are no external factors affecting its motion.