--- QUESTION TEXT Question 1 (Physics/Kinematics Problem) Tom and Johny are playing table...
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QUESTION_TEXT
Question 1 (Physics/Kinematics Problem)
Tom and Johny are playing table tennis on a standard ping pong table of length 9 feet. However, these guys are crazy since they are playing the game in a compartment of a train moving at 90 feet per second!
How long will it take the ball to reach Johny after Tom's smash if the ball's speed relative to the track when Tom hits it is 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 Johny, it travels exactly the full length of the table.
**Select any one of the following
Show answer & explanation
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.