What is the potential energy of the crate after it is lifted

Reference no: EM133515213

Questions:

1. What is work? What is energy? How is energy related to work?

2. An initially stationary 15.0-kg crate of cheese wheels is pulled via a cable a distance d= 5.70m up a frictionless ramp to a height of h= 2.50m, where it stops. What is the potential energy of the crate after it is lifted? If it takes 10 seconds to lift the cheese, what is the power rating of the lifting device?

3. In a simulation on earth, an astronaut in his space suit climbs up a vertical ladder. On the moon, the same astronaut makes the same climb. In which case does the gravitational potential energy of the astronaut change by a greater amount? Account for your answer.

4. A 2000 kg car is moving with a velocity of 50 km/hr. What is its kinetic energy? If the car reduces its speed by half, by what factor is the kinetic energy changed?

5. State the Law of Conservation of Energy. Give an example of a system where energy is conserved.

Reference no: EM133515213

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