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Physics Help >> Index to Physics Homework Help »Conservation of Energy Quiz 2

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A kg block slides down a ramp from a height of m. The block has a speed of m/s when it reaches the bottom. There is friction. What is the work (in J) done by gravity?

In the previous question, what is the work (in J) done by friction?

A kg object is suspended from a spring with k = N/m. The mass is pulled m downward from its equilibrium position and allowed to oscillate. What is the maximum kinentic energy of the object in J?

A wrecking ball pendulum of length m is released from rest at an angle of º from the vertical. What is the maximum speed of the pendulum?

A spring compressed by cm is used to propel a g pellet vertically upward to a maximum height of m. What is the spring constant in N/m)?

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