A stationary ball is free to move. The ball is hit with a bat.
The graph shows how the force of the bat on the ball changes with time.
The ball has a mass of 0.044 kg.
What is the speed of the ball immediately after being hit?

1 )
13 m s$^{−1}$
2 )
60 m s$^{−1}$
80 m s$^{−1}$
4 )
160 m s$^{−1}$
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