4. An object of mass 0.550 kg lifted from the floor to a height of 350 m at a co

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4. An object of mass 0.550 kg lifted from the floor to a height of 350 m at a constant speed. How much work is done by the lifting force (include units)? How much work is done by the Earth on the object? What is the net work done on the object? What is the change in kinetic energy of the object? Are your results consistent with the work-energy principle? Explain. 5. If the object in Question 4 is released from rest after it is lifted, what is its kinetic energy just before it hits the floor? What is its velocity? Show your work and include units.

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4. An object of mass 0.550 kg lifted from the floor to a height of 350 m at a co

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