CQ In 6Fig. 3.30, a spring-loaded “cannon” on a wheeled car fires a metal ball v

Question

CQ In 6Fig. 3.30, a spring-loaded “cannon” on a wheeled car fires a metal ball vertically. The car is given a push and set in motion horizontally with constant velocity. A pin is pulled with a string to launch the ball, which travels upward and then falls back into the moving cannon every time. Why does the ball always fall back into the cannon? Explain.  

the horizontal and vertical motion are the same

the horizontal motion affects the vertical motion

the vertical motion affects the horizontal motion

the horizontal motion is independent of the vertical motion

Explanation / Answer

This happens because the horizontal motion is independent of the vertical motion.

And when the ball moves in vertical direction, no other force acts on the ball in the horizontal direction and that is why it always falls back to the cannon.

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