A 50g ball travelling at 25ms is bounced off a brick wall, Ask an Expert

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Q. Two spheres are cut from the certain uniform rock. One has a diameter of 280.0 mm. The mass of the second sphere is six times greater than the first sphere. Find out the radius of the second sphere?

Q. A 50g ball travelling at 25m/s is bounced off a brick wall and rebounds at 22m/s. A high speed camera records this event. If the ball is in contact with the wall for 3.5ms, what is the average acceleration of the ball throughout this time interval?

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