A boy throws a ball vertically upward with velocity 20 m/s. Time after which ball returns to his hands (g=10) is MCQ with Answer and Explanation

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A boy throws a ball vertically upward with velocity 20 m/s. Time after which ball returns to his hands (g=10) is

A. 4 s

B. 1 s

C. 2 s

D. 8 s

Answer: Option A

Solution (By JKSSB Mock Tests)

Total time = 2u/g = 40/10 = 4 s.

This question belongs to: Science Physics

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This question belongs to: Science Physics

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B. Light Emitting Diode

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Correct Answer: Option B

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A ball is dropped from a height of 20 m. Time to reach ground (g=10) is

A. 4 s

B. 1 s

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Correct Answer: Option C

Explanation:
h = ½gt² => t = √(2h/g) = √(40/10) = √4 = 2 s. Free fall formula. Final velocity v = gt = 20 m/s.

This question belongs to: Science Physics

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