Question

A ball is throwns vertically with a speed of 20m/s calculate the total time taken by the ball to reach the ground again take g=10m/s^s​

Answer 1

Answer :

Initial velocity = 20m/s

Acc. due to gravity = 10m/s²

We have to find time taken by ball to reach the ground$.$

★ For a body thrown vertically upward with an initial velocity u;

• Max. height reached = u²/2g
• Time of ascent = u/g
• Total time of flight = 2u/g

⭆ T = 2u/g

⭆ T = 2(20)/10

⭆ T = 40/10

⭆ T = 4s

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