A ball is dropped from rest and falls freely under gravity. What is its velocity after 3 seconds? (g = 9.8 m/s²)

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Question

A ball is dropped from rest and falls freely under gravity. What is its velocity after 3 seconds? (g = 9.8 m/s²)

Accepted Answer

C. 29.4 m/s — Using v = u + gt, with u = 0 and t = 3 s: v = 0 + (9.8 × 3) = 29.4 m/s. The ball accelerates uniformly at g each second, so after 3 seconds its speed is three times 9.8 m/s.

Answer

B. 9.8 m/s

Answer

D. 44.1 m/s

Answer

C. 29.4 m/s

Answer

A. 3.0 m/s

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