Front

What happens to a car's kinetic energy when it brakes to a stop?

Back

All its kinetic energy is converted to heat through friction.

Front

How can you increase the power output of a machine?

Back

By increasing the work done, increasing the force with which the work is done, or decreasing the time in which the work is done.

Front

What is the primary factor influencing the kinetic energy of a moving truck?

Back

Its velocity.

Front

If an object gains 200 J of potential energy when lifted 10m, how much potential energy does it gain when lifted 20m?

Back

Twice as much (400 J).

Front

Which ball has more potential energy: a 10 kg ball at 2 m or a 5 kg ball at 5 m?

Back

The 5 kg ball has more potential energy.

Front

Define kinetic energy.

Back

The energy that an object possesses due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

Define potential energy.

Back

The energy stored in an object due to its position or configuration, commonly calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the formula for calculating power?

Back

Power (P) is calculated as P = Work (W) / Time (t).

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in its energy.

Front

What is the unit of energy in the International System of Units (SI)?

Back

Joule (J).