(Answered) 1 a 1300 kg car moving at 50 ms is stopped by the actions

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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.

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