A ball is thrown vertically upwards attains a maximum height of 45m .

1.	A ball is thrown vertically upwards attains a maximum height of 45m . The time after which velocity of the ball become equal to half the velocity of projection ??
Answer» Answer: INITIAL SPEED =u u^2=2gh u=root21045=30 m/s Now, LET at time t, v=u/2 upword V=u-gt u/2=u-10*t u/2=10t t=u/20=30/20=1.5 SECOND

A ball is thrown vertically upwards attains a maximum height of 45m . The time after which velocity of the ball become equal to half the velocity of projection ??

Answer»

Answer:

INITIAL SPEED =u

u^2=2*g*h

u=root2*10*45=30 m/s

Now, LET at time t, v=u/2 upword

V=u-gt

u/2=u-10*t

u/2=10t

t=u/20=30/20=1.5 SECOND

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A ball is thrown vertically upwards attains a maximum height of 45m . The time after which velocity of the ball become equal to half the velocity of projection ??​

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A ball is thrown vertically upwards attains a maximum height of 45m . The time after which velocity of the ball become equal to half the velocity of projection ??