If a ball is thrown vertically upwards with a velocity of 40 m s , then velocity of the ball after two seconds will be ( g = 10 m s 2 )

Question

If a ball is thrown vertically upwards with a velocity of 40 m s , then velocity of the ball after two seconds will be ( g = 10 m s 2 ), 15 m s, 20 m s, 25 m s, 28 m s

MARKS App · Accepted Answer

Initial velocity, u = 40 m s Acceleration, a = − g m s 2 = − 10 m s 2 Time = 2 seconds (given) By 1 st equation of motion, we get– v = u + a t ⇒ v = 40 − 10 ( 2 ) = 20 m s

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