PE and KE

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration. It is energy that has the potential to be converted into kinetic energy.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. It depends on the mass of the object and the square of its velocity, calculated using the formula KE = 1/2 mv².

Front

How is gravitational potential energy calculated?

Back

Gravitational potential energy (PE) is calculated using the formula PE = mgh, where m is mass (in kg), g is the acceleration due to gravity (approximately 9.81 m/s²), and h is height (in meters).

Front

What happens to potential energy when an object falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases, assuming no other forces (like air resistance) are acting on it.

Front

What is the relationship between kinetic energy and speed?

Back

Kinetic energy is proportional to the square of the speed of an object. This means that if the speed doubles, the kinetic energy increases by a factor of four.

Front

Can energy be created or destroyed?

Back

No, according to the law of conservation of energy, energy cannot be created or destroyed; it can only be transformed from one form to another.

Front

What is an example of an object with high potential energy?

Back

A book placed on a high shelf has high potential energy due to its elevated position relative to the ground.

Front

What is an example of an object with high kinetic energy?

Back

A moving car has high kinetic energy due to its mass and speed.

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

What is free fall?

Back

Free fall is the motion of an object under the influence of gravity alone, with no other forces acting on it.