Physics Help >> Index to Physics Homework Help »Conservation of Energy Quiz 4

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 1
A kg ball is thrown at m/s at an angle of º above the horizontal. What is the kinetic energy (in J) of the baseball at the highest point of the trajectory?

 2
A pendulum with a mass of kg and a length of m is displaced through an angle of º then released. Eventually the maximum angle of swing is only 10.0º. How much energy (in J) has been lost to friction?

 3
A kg bock on a horizontal surface slides into a horizontal spring with a speed of m/s. The spring compresses m before coming to rest. If the coefficient of friction between the block and the surface is 0.520, what is the force constant of the spring (in N/m)?

 4
A kg block rests over a hole in a table. A g bullet is shot straight up into the block. The bullet and block rise m above the table. What speed (in m/s) did the bullet have just before hitting the block?

 5
Mass 1 ( kg) slides down a frictionless surface starting from rest at a height of m. It collides with mass 2 ( kg) and they stick and move off together. What is the speed (in m/s) of the combined mass immediately after collision?

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