alleryA car slows from 30 m/s to 10 m/s in 4 s. What is the magnitude of its deceleration?
A10 m/s squared
B7.5 m/s squared
C5 m/s squared
D20 m/s squared
Answer & Solution
Correct answer: C. 5 m/s squared
Speed drops 20 m/s in 4 s, so the deceleration is 5 m/s squared.
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