Q 11CQ - College Physics (Urone)

Question

Question: What energy transformations are involved when a dragster engine is revved, its clutch let out rapidly, its tires spun, and it starts to accelerate forward? Describe the source and transformation of energy at each step.

Step-by-Step Solution

Answer

The translational kinetic energy is converted to rotational kinetic energy.

Step 1: Determine the energy transformation involved.

When the dragster’s engine is revved, the reciprocating motion of the piston is transmitted to the flywheel of the engine with the help of crankshaft. Therefore, the translational kinetic energy is converted into pure rotational kinetic energy.

Step 2: Description of transformation at each step.

When the clutch is let out, the fuel starts burning converting the chemical energy into heat which runs the engine. The energy from engine is converted to mechanical energy of the tire. This mechanical energy is then converted to heat at the tyres and kinetic energy of the vehicle.