Answer:
The
velocity time graph shows that the velocity of the ball at t = 0 is zero.
Initial velocity of ball, u = 0.
Velocity of ball at t = 4 s is 20
That is, final velocity, u = 20
Time, t = 4 s
Acceleration of the ball,
or (1)
Also, mass of ball,
Force acting on the ball, F=
ma
or
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