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7. An object travels with a velocity v1=4m/s to the right. Then, its direction of motion and magnitude of velocity are changed (v2) as in

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7. An object travels with a velocity v1=4m/s to the right. Then, its direction of motion and magnitude of velocity are changed (v2) as in the picture after it hits a wall. a) Find the impulse given to this object. (1-pnts) b) What is the magnitude of the force that reversed its direction in 0.3sec ? (1-pnts)

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