Upward throw velocity after 3 seconds

Practice question

Question

A ball is thrown upwards with a speed of 38m/s. What is its velocity after 3s? (Take g\=10m/s2)

Options

Choose one · Correct answer highlighted

5 m/s 8 m/s Correct 10 m/s 12 m/s

Explanation

Use v=v0+at. Here, v0=38m/s, a=−10m/s2, t=3s. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 8 m/s as the result, so option B is correct.

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