Work, energy & power - CIE IGCSE Physics

Front

What are fossil fuels?

Back

Energy resources that formed from buried plants and animals that lived a very long time ago.

Front

How much work is done on a 200-kg crate that is hoisted 2 m?

Back

4000 J (Work = mass x gravity x height = 200 kg x 9.8 m/s² x 2 m).

Front

What is the link between energy transferred and work done?

Back

Energy transferred = work done.

Front

Which of the following is NOT a fossil fuel?

Back

Water.

Front

Which requires more power – a person walking up stairs or a person running up stairs?

Back

Running requires more power.

Front

Define work in physics.

Back

Work is done when a force causes an object to move in the direction of the force.

Front

What is the formula for calculating power?

Back

Power = Work done / Time taken.

Front

What is kinetic energy?

Back

The energy an object possesses due to its motion.

Front

What is the formula for kinetic energy?

Back

Kinetic Energy = 1/2 mv² (where m is mass and v is velocity).

Front

What is potential energy?

Back

The energy stored in an object due to its position or height.