### What is the change of momentum of the ball

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Q. A ball of mass 5.5 kg moving with speed of 1.8 m/s in the +x-direction hits a wall and bounces back with the same speed in the -x-direction. What is the change of momentum of the ball?

Q. A 4.1 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 3.3 m/s2, find the force exerted by the rope on the bucket.

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