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A car of mass nine hundred kg is travelling at a steady speed of 30m/s against a resistive force of 2000N.

Calculate the energy used in 1.0 second against resistive force.

Calculate the kinetic energy.

What is the minimum power that the car engine has to deliver to the wheels?

What form of energy is in fuel,used by engine to drive car?

Kinetic energy=$\frac{1}{2}m{v}^{2}=\frac{1}{2}\times 900\times {\left(30\right)}^{2}=405000J$

power that the car engine has to deliver to the wheels=$Fv=2000\times 30=60000W$

The chemical energy of the molecules of the fuel is used by the engine.

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