Question

A ball rolls off a table with a horizontal velocity of 7 m/s. If
it takes 0.8 s to reach the floor:

(a) What is the vertical component of the ball's velocity just
before it hits the floor?

(b) What is the horizontal component of the ball's velocity just
before it hits the floor?

Use g = 10 m/s^{2}

Answer #1

Initial vertical velocity of ball is along horizontal 7 m/s

initial vertical velocity is 0 m/s

A)

vertical velocity of ball at collision

so ball has vertical velocity 8 m/s downwards.

B)

There will be no change in horizontal velocity of ball because no acceleration is acting along horizontal.

Horizontal velocity remains constant.

Thanks for asking.

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