Calculating Energy

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = (1/2)mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state, commonly associated with gravitational potential energy, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the law of conservation of energy?

Back

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

Front

How do you calculate kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula KE = (1/2)mv², where m is the mass of the object and v is its velocity.

Front

What factors affect kinetic energy?

Back

Kinetic energy is affected by two factors: mass and speed. Increasing either mass or speed increases kinetic energy.

Front

If an object has 100 Joules of kinetic energy and moves at a velocity of 2 m/s, what is its mass?

Back

The mass of the object is 50 kg, calculated using the formula m = 2KE/v².

Front

What is the relationship between potential energy and height?

Back

Potential energy increases with height; the higher an object is positioned, the greater its potential energy due to gravitational force.

Front

Can energy be created or destroyed?

Back

No, energy cannot be created or destroyed; it can only change forms.

Front

What is the formula for gravitational potential energy?

Back

The formula for gravitational potential energy (PE) is PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

What is the kinetic energy of a 5 kg cat running at 3 m/s?

Back

The kinetic energy of the cat is 22.5 J, calculated using KE = (1/2)mv².