Tom smashes a ball on a pool table.
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Tom smashes a ball on a pool table. The ball travels at a speed relative to the track of 18 ft per second. Assume that when Tom smashes the ball, the ball is exactly at the tail end of the table and when it reaches Johnny, it travels exactly the full length of the table. What is the time duration for the ball to cover the distance?
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Answer: B. 1/2 second
Covering a 9 ft table at an effective speed of 18 ft/s takes 9 / 18 = 0.5 = 1/2 second.
Step-by-step Derivation:
Step 1: The length of the table to be traversed by the ball is 9 feet.
Step 2: The relative smash speed across the table is 18 feet per second.
Step 3: Time = Distance / Speed = 9 / 18 = 1/2 second.