FAM Act 5, 6, and 7 Flashcard

Front

What happens to kinetic energy when mass doubles?

Back

Kinetic energy doubles.

Front

What is required to change the direction or speed of an object?

Back

An unbalanced force.

Front

How does kinetic energy change when speed decreases from 100 km/h to 50 km/h?

Back

Kinetic energy decreases from 400 kJ to 100 kJ.

Front

Define kinetic energy.

Back

Kinetic energy is the energy an object possesses due to its motion.

Front

What is the formula for kinetic energy?

Back

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

Front

If an object has a mass of 2 kg and is moving at 3 m/s, what is its kinetic energy?

Back

Kinetic energy = 1/2 * 2 kg * (3 m/s)² = 9 Joules.

Front

What is the relationship between speed and kinetic energy?

Back

Kinetic energy increases with the square of the speed.

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to change its state of motion.

Front

What is a balanced force?

Back

A balanced force is when two forces acting on an object are equal in size but opposite in direction, resulting in no change in motion.

Front

How does mass affect kinetic energy?

Back

Increasing the mass of an object increases its kinetic energy if the speed remains constant.