Energy

Front

What is the definition of work in physics?

Back

Work is defined as the product of force and the distance over which it acts, in the direction of the force. It is measured in joules (J).

Front

What is the relationship between work, energy, and power?

Back

Work and energy are closely related; work done on an object results in a change in energy. Power is the rate at which work is done or energy is transferred, measured in watts (W).

Front

What is the formula for calculating power?

Back

Power (P) = Work (W) / Time (t).

Front

What is gravitational acceleration on Earth?

Back

The acceleration due to gravity on Earth is approximately 9.8 m/s².

Front

What happens to potential and kinetic energy in a pendulum?

Back

As a pendulum swings, potential energy decreases while kinetic energy increases as it moves from the highest to the lowest point.

Front

What type of energy does a battery convert to electrical energy?

Back

A battery converts chemical energy into electrical energy.

Front

At which point in a pendulum's swing is kinetic energy greatest?

Back

Kinetic energy is greatest at the lowest point of the swing.

Front

What is kinetic energy?

Back

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

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state, commonly gravitational potential energy, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.