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 $(g = 10 \, m/s^2)$

• A. 15 m/s
• B. 20 m/s
• C. 25 m/s
• D. 28 m/s

Answer 1

Answer: (B)

20 m/s

Answer 2

Initial velocity (u) = 40 m/s Acceleration $a = -g m/s^2 = -10 m/s^2$ Time = 2 seconds By Ist equation of motion, v = u + at v = 40 - 10 (2) =20 m/s