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0 kg toy car can move along an x-axis. The graph gives Fx of the force acting on the car, which begins at rest at time t = 0. The scale on the Fx...

A 5.0 kg toy car can move along an x-axis. The graph gives Fx of the
force acting on the car, which begins at rest at time t = 0.
The scale on the Fx axis is set by Fxs = 5.0 N.
a. What is the momentum at t = 4.0 s?
b. What is the momentum at t = 7.0 s.

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