Energy, Work and Power

Front

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

Back

Energy is the capacity to do work, work is the transfer of energy, and power is the rate at which work is done.

Front

Define Kinetic Energy (KE).

Back

Kinetic Energy is the energy of an object due to its motion, calculated using the formula KE = 1/2mv².

Front

What factors affect Kinetic Energy?

Back

Kinetic Energy depends on the mass (m) of the object and the square of its velocity (v).

Front

What is the formula for Potential Energy (PE)?

Back

The formula for Potential Energy is PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

How do you calculate the Potential Energy of an object?

Back

Potential Energy is calculated by multiplying the mass of the object by the acceleration due to gravity and the height above the ground.

Front

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

Back

The unit of energy in the SI system is the Joule (J).

Front

Explain the concept of work in physics.

Back

Work is done when a force causes an object to move in the direction of the force, calculated as Work = Force × Distance.

Front

What is the difference between work and power?

Back

Work is the total energy transferred, while power is the rate at which work is done, calculated as Power = Work / Time.

Front

How does running up stairs compare to walking in terms of work and power?

Back

The work done is the same for both, but the power is greater when running because it is done in less time.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy stored in an object due to its height above the ground, calculated using PE = mgh.