The speed of the ball seven seconds later is 28.6 m/s.
What is the speed of the ball?
We have the following information;
initial velocity of the ball = 40 m/s
time taken = 7 seconds
Acceleration of the ball = 9.8 m/s^2
Now;
v = u - gt (the ball is moving upwards)
v = 40 - (9.8 * 7)
v = 28.6 m/s
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