Question

guys:-

detailed solution required:-

Qno:-7​

Answer 1

ans is 60

for explanation check soln

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Answer 2

Answers given:

How far: 60m

How long: 2s

To find how long the ball is in the air, use the equation:

d = v1*t + (1/2)at^2.

apply this equation for vertical displacement...

As vertical and horizontal components of velocities are given, angle is not required. At the highest point the velocity will be zero (v = 0). Initial vertical velocity = u = 10 m/s. Acceleration a = - 9.8 m/s^2 (-ve because acceleration due to gravity is always downwards i.e. opposite of the +ve upwards displacement) Apply v = u + at to get t, the time to reach the highest point. Double that to get the time during which the ball is in air (T).

As the horizontal velocity remains constant throughout, determine horizontal displacement in time T (calculated above) using s = ut

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