A 13 kg block is at rest on a level floor a 400g globof, Ask an Expert

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A 13 kg block is at rest on a level floor. A 400g globof putty is thrown at the block so that the putty travelshorizontally, hits the block, and sticks to it. The block andputty slide 15cm along the floor. If the coefficeint ofsliding friction is 0.4, what is the initial speed of the putty?

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