Recent content by thepegmeister

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    Can kinetic energy and potential energy both increase?

    Thank you, Vela! I really appreciate it.
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    Positive vs. negative work in an elevator?

    Thank you guys so much! I wish they would explain these things in the textbook - the small details always get me.
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    Can kinetic energy and potential energy both increase?

    Homework Statement A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. (a) What type(s) of energy is (are) changing? Is each type increasing or decreasing? Why? Homework Equations...
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    Positive vs. negative work in an elevator?

    Homework Statement You are moving into an apartment and take the elevator to the 6th floor. Does the force exerted on you by the elevator do positive or negative work when the elevator (a) goes up and (b) goes down? Explain your answers. Suppose your weight is 685N and that of your...