What impulse was delivered to the sled

Reference no: EM13537371

A sled and rider, gliding over horizontal, frictionless ice at 4.5 , have a combined mass of 72 . The sled then slides over a rough spot in the ice, slowing down to 2.7. What impulse was delivered to the sled by the friction force from the rough spot?

Reference no: EM13537371

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