Lukenicholls2008 Lukenicholls2008

11-10-2022
Physics

Answered

4 A tennis ball.is hit vertically upwards and leaves the racquet with a velocity of +20 m/s.
a
b
Explain why the acceleration due to gravity (g) in this question should be given a negative value.
Calculate the velocity of the ball after 2 s. (Hint: you may find it easier to first calculate the change in
velocity over the 2 s, and then work out the final velocity.)
C
Calculate the velocity of the ball 4 s after it started moving.
d Your answer to part b should have been a negative value. Explain what this means.

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