Motion Test

Result

Motion Test - 15

Score
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Rank
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Weekly Quiz Competition

Question 1
1 / -0

Use the following information to answer the next question.

A ball is thrown vertically upward with an initial velocity of 9.8 m/s. Air friction is negligible.

The velocity of the ball with which it strikes back the ground is

A
9.8 m/s downward

B
4.9 m/s downward

C
2.5 m/s downward

D
1.2 m/s downward

Solution

Since air friction is negligible, the final velocity is equal in magnitude and opposite in direction to the initially velocity with which the ball is thrown upward. Hence, the velocity with which it strikes the ground is 9.8 m/s downward.

The correct answer is A.