Asked by G
                A 1500kg car moving at a speed of 20 m/s comes to a halt. How much work was done by the brakes?
How fast can a 2.0 horsepower motor lift a 200 kg mass?
A boy with a mass of 20 kg is riding on a 10 kg cart which is travelling at 3 m/s. He jumps off in such a way that he lands on the ground with no horizontal speed. What was the change of speed of the cart?
not sure how to solve please help
            
        How fast can a 2.0 horsepower motor lift a 200 kg mass?
A boy with a mass of 20 kg is riding on a 10 kg cart which is travelling at 3 m/s. He jumps off in such a way that he lands on the ground with no horizontal speed. What was the change of speed of the cart?
not sure how to solve please help
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