Work, Power, and Energy

Front

What are the units for work?

Back

Joules (J)

Front

What is done when a force acts on an object and the object moves in the direction of the force?

Back

Work

Front

Which produces more power: lifting a mass of 10 kg 10 meters in 10 seconds or in 5 seconds?

Back

Lifting a mass of 10 kg 10 meters in 5 seconds produces more power.

Front

What is the formula for calculating kinetic energy?

Back

Kinetic Energy (KE) = 0.5 * mass (m) * velocity (v)^2

Front

Calculate the kinetic energy of a 4 kg shotput thrown with a velocity of 13 m/s.

Back

Kinetic Energy = 338 J

Front

What is the formula for power?

Back

Power (P) = Work (W) / Time (t)

Front

If you do 90 joules of work in 30 seconds, how much power have you generated?

Back

3 watts

Front

What is the relationship between work, power, and time?

Back

Power is the rate at which work is done over time.

Front

What is the SI unit of power?

Back

Watt (W)

Front

Define work in physics.

Back

Work is done when a force causes an object to move in the direction of the force.