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A tennis ball is thrown vertically upward with an initial velocity of +1.6 m/s. What will the ball's speed after 2 s?

A -23 m/s
B -10 m/s
C -18 m/s
D -9 m/s

User Vinnyjames
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1 Answer

5 votes

Answer: C -18 m/s

Step-by-step explanation:

This problem is related to vertical motion and the equation that is useful for this situation is:


V=V_(o)-gt

Where:


V is the final velocity of the tennis ball at 2 s


V_(o)=1.6 m/s is the initial velocity of the tennis ball (directed upwards)


t=2s is the time


g=9.8 m/s^(2) is the constant acceleration due to gravity


V=1.6 m/s-(9.8 m/s^(2))(2 s)


V=-18 m/s This is the final velocity of the ball at
t=2s (directed downwards)

User Malcolm
by
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