A Boy on a Skate Board Skates Off a Horizontal

question 20

Multiple Choice

A boy on a skate board skates off a horizontal bench at a velocity of 10 m/s. One tenth of a second after he leaves the bench, to two significant figures, the magnitudes of his velocity and acceleration are:

• A)10 m/s; 9.8 m/s2.
• B)9.0 m/s; 9.8 m/s2.
• C)9.0 m/s; 9.0 m/s2.
• D)1.0 m/s; 9.0 m/s2.
• E)1.0 m/s; 9.8 m/s2.

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Definitions:

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