Stopped by the actions of its brakes

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1. A 1300 kg car moving at 5.0 m/s is stopped by the actions of its brakes. The work done by the cars brakes is           joules.

2. The total energy of a 5.0 kg falling rock is 5000J. If its potential energy is 2055J, the kinetic energy of the rock is            J. 

3. If the kinetic energy of a 6.0 kg falling rock is 3160J, the rocks speed is         m/s.

4. Assume an asteroid is in the shape of a sphere and has a mass of 900 kilograms. Determine the density  (in grams per cubic centimeter) of this asteroid if its diameter is known to 0.8 meters.

Reference no: EM131390157

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