Energy Work & Power

Front

What is work in physics?

Back

Work is defined as the product of force and the distance over which it is applied. It is measured in Joules (J).

Front

How do you calculate work done when a force is applied?

Back

Work (W) = Force (F) × Distance (d) where force is in Newtons and distance is in meters.

Front

What is the formula for calculating gravitational potential energy?

Back

Potential Energy (PE) = mass (m) × gravitational acceleration (g) × height (h).

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 the principle of conservation of energy?

Back

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

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature.

Front

What happens to molecules at higher temperatures?

Back

At higher temperatures, molecules move faster and have more kinetic energy compared to those at lower temperatures.

Front

What is the unit of power?

Back

The unit of power is the Watt (W), which is defined as one Joule per second.

Front

How do you calculate power?

Back

Power (P) = Work (W) / Time (t), where work is in Joules and time is in seconds.

Front

What is the difference between conduction and convection?

Back

Conduction is the transfer of heat through direct contact, while convection involves the movement of fluids.