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Q. A 5.0 kg toy race car can move along an x axis. It gives Fx of the force acting on the car, which begins at rest at time t = 0. (The vertical axis is marked in increments of 2.5 N.) what is the momentum at t=6?

Q. A cello string .75m long has a 220-Hz fundamental frequency. Find the wave speed along the vibrating string. How can you produce a low- pitch by altering the length of the string, the thickness, and tension?

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