Understanding Work and Power

What is a common misconception students have about work and power?

• Work and power are the same.

• Energy is unrelated to work.

• Power is the ability to do work.

• Work is the rate at which power is done.

In the example of the ball being kicked, what is the work done if a force of 8 Newtons moves the ball 5 meters?

• 13 Joules

• 5 Joules

• 40 Joules

• 8 Joules

What is the relationship between work and energy?

• Energy is the ability to do work.

• Work is the energy used to heat an object.

• They are unrelated concepts.

• Work is the ability to stop an object.

How is power defined in terms of energy?

• Power is the energy lost per second.

• Power is the energy stored in an object.

• Power is the energy delivered per second.

• Power is the energy used per minute.

How much energy is transferred to the ball every second if 40 Joules are transferred in 10 seconds?

• 2 Joules per second

• 4 Joules per second

• 6 Joules per second

• 8 Joules per second

What happens when the energy per second becomes zero for a moving object?

• The object accelerates.

• The object maintains its speed.

• The object stops moving.

• The object changes direction.

What does the term 'energy per second' refer to?

• Work

• Force

• Power

• Velocity

If a device uses 1000 watts, how much energy does it consume per second?

• 1000 Joules

• 10 Joules

• 500 Joules

• 100 Joules

What does a 15-watt phone charger indicate?

• It uses 15 Joules of energy per minute.

• It uses 15 Joules of energy per second.

• It uses 150 Joules of energy per second.

• It uses 1.5 Joules of energy per second.

What is the unit of power commonly used in household appliances?

• Joule

• Meter

• Newton

• Watt