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A force that averages 984 N is applied to a 420-g steel ball moving at 13.8 m/s by a collision lasting 27.0 ms. If the force is in a direction opposite to the initial velocity of the ball, find the final speed of the ball.

A force that averages 984 N is applied to a 420-g steel ball moving at 13.8 m/s by a collision lasting 27.0 ms. If the force is in a direction opposite to the initial velocity of the ball, find the final speed of the ball.

Grade:upto college level

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
8 years ago
We have to find out the final speed of the ball.
To find out the impulse, substitute -984 N for the net force F and 27.0 ms for the time interval Δt in the equation J = F Δt,
J = F Δt
= (-984 N) (27.0 ms)
= (-984 N) (27.0 ms) (10-3 s/1 ms)
= -26.6 N. s

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