Work,Energy and Power

Front

What is the principle of conservation of energy?

Back

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

Front

How does potential energy differ from kinetic energy?

Back

Potential energy is the stored energy in an object due to its position or condition, while kinetic energy is the energy of an object in motion.

Front

What happens to the potential energy of an object as it falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases, resulting in a constant total energy.

Front

What type of energy is stored in a compressed spring?

Back

The energy stored in a compressed spring is called elastic potential energy.

Front

What type of energy do fossil fuels contain?

Back

Fossil fuels contain chemical energy, which is released during combustion.

Front

Define work in the context of physics.

Back

Work is defined as the transfer of energy that occurs when a force is applied to an object and the object moves in the direction of the force.

Front

What is the formula for calculating work?

Back

The formula for calculating work is W = F × d × cos(θ), where W is work, F is the force applied, d is the distance moved, and θ is the angle between the force and the direction of motion.

Front

What is power in physics?

Back

Power is the rate at which work is done or energy is transferred over time.

Front

How is power calculated?

Back

Power is calculated using the formula P = W/t, where P is power, W is work done, and t is the time taken.

Front

What is the unit of power?

Back

The unit of power is the watt (W), which is equivalent to one joule per second.