Work and Energy Flashcardziz

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

How do you calculate the velocity of an object given its kinetic energy?

Back

To find the velocity, rearrange the kinetic energy formula: v = sqrt(2KE/m).

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy is directly proportional to the mass of the object; as mass increases, kinetic energy increases if velocity remains constant.

Front

What is the formula for gravitational potential energy?

Back

Gravitational potential energy (PE) is calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

How do you determine the height from which an object falls using its final velocity?

Back

Use the formula h = v²/(2g), where v is the final velocity and g is the acceleration due to gravity.

Front

What is the work-energy principle?

Back

The work-energy principle states that the work done on an object is equal to the change in its kinetic energy.

Front

How is work defined in physics?

Back

Work is defined as the product of the force applied to an object and the distance over which that force is applied, W = Fd, where W is work, F is force, and d is distance.

Front

What is the difference between work and power?

Back

Work is the energy transferred by a force over a distance, while power is the rate at which work is done, calculated as Power = Work/time.

Front

If two objects are moving at the same speed, how does their mass affect their kinetic energy?

Back

The object with greater mass will have more kinetic energy, as KE is proportional to mass.

Front

What happens to the kinetic energy of an object when it comes to a stop?

Back

The kinetic energy becomes zero, indicating that all the energy of motion has been lost.