1. Determine the kinetic energy of a 1000 kg roller coaster car that is moving with a speed of 20.0 m/s.
2. The potential energy of a 40 kg cannon ball is 14000 J. How high was the cannon ball to have this much potential energy?
2. The potential energy of a 40 kg cannon ball is 14000 J. How high was the cannon ball to have this much potential energy?
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i can only answer no.1
200,000J
KE=1/2mv2
KE=1/2(1000kg)(20.0m/s)2
KE=200.000kg m2/s2=200.000J