How much work is rquired to increase the speed of a 1200 kg car from 10km/h to 30 km/h?

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How much work is rquired to increase the speed of a 1200 kg car from 10km/h to 30 km/h?

Neglect air resistance.

2007-11-17 07:08:16 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Physics

1 answers

Work changes kinetic energy. Kinetic energy is 1/2 m v^2. You have mass and the two velocities (which must be converted into m/s rather than km/h). Calculate the two kinetic energies. Their difference is the work done.

2007-11-17 07:12:54 · answer #1 · answered by jgoulden 7 · 0⤊ 0⤋