Distance covered by a freely falling body in 2 seconds will be__________________?
Correct answer: B. 19.6 m
- A. 4.9 m
- B. 19.6 m
- C. 39.2 m
- D. 44.1 m
Explanation
For a freely falling body starting from rest, distance is s = 1/2 gt². Using g = 9.8 m/s² and t = 2 s, s = 1/2 x 9.8 m/s² x (2 s)² = 19.6 m. The tempting answer 4.9 m comes from using 1 second instead of 2 seconds.
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About Acceleration
Acceleration measures the rate at which velocity changes with time, including changes in speed, direction or both. Work includes average and instantaneous acceleration, the relation a = Δv/Δt, uniform acceleration equations, and interpreting velocity time and displacement time graphs, with acceleration carefully distinguished from velocity.
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