Al is moving by you at a very high speed (close to the speed of light). You get out a clock and measure 10 seconds going by. If you also watch a clock in Al's ship, how much time will you see it record during your 10 seconds?
A) You will see Al's clock record less than 10 seconds.
B) You will see Al's clock record more than 10 seconds.
C) You will see Al's clock agree that 10 seconds go by.
A) You will see Al's clock record less than 10 seconds.
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A boy kicks a football with an initial velocity of 20 m/s at an angle of 25° above the horizontal. The magnitude of the acceleration of the ball while it is in flight is
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