Physics: Lesson 16 Power

Power in physics is the rate at which _____ is used.

• Current

• Speed

• Energy

• Velocity

• Force

To calculate power, we use the formula: Power = Work divided by ______.

• Velocity

• Force

• Distance

• Time

• Acceleration

What is the standard unit of measurement for power?

• Ampere

• Volt

• Newton

• Joule

• Watt

Will you use more power running up the stairs or walking up the stairs?

• Running up the stairs

• Walking up the stairs

• The same in both

What is the equation used for calculating power from force and velocity?

• Power = force/velocity

• Power = force * velocity

• Power = force + velocity

• Power = velocity/force

• Power = 1/2 (force * velocity)

What is the equation used for calculating electrical power?

• P = I/V

• P = I + V

• P = V/I

• P = I * V

• P = I - V

If it takes 10 J of work to move a rock 15 meters in 5 seconds, what is the power?

• 1 W

• 2 W

• 50 W

• 150 W

• 200 W

If it takes 50 J of work to climb a set of stairs, how fast would you have to climb them to use 5 Watts of power?

• 2 seconds

• 5 seconds

• 9 seconds

• 10 seconds

• 50 seconds

What is the electrical power of a circuit generating 5 Amps and 8 Volts?

• 5 W

• 8 W

• 13 W

• 20 W

• 40 W

How many watts are in a horsepower?

• 1 W

• 2 W

• 350.3W

• 745.7W

• 932.9 W