Question

Find the resistance force of a machine with a jack with a mechanical advantage of 15.5 and an input force of 54.5 N.

Answer 1

2.The brakes on a bicycle apply 125 N of frictional force to the wheels as the bicycle travels 14.0 m. How much work have the brakes done on the bicycle? 3. While rowing in a race, John does 132 J of work while pulling the oar 0.800 m. How much force do John’s arms exert? 4. A tractor exerts a force of 20,000 newtons while doing 160,000 J of work to move a trailer. How far did the tractor move the trailer? 5. A 3-meter-long ramp is used to lift a piano to a moving truck, which is 1 meter off the ground. What is the mechanical advantage of the ramp?

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