Power Problems

In physics, power is the rate at which _________ is used.

• Current

• Speed

• Energy

• Force

To solve for power, we use the formula: Power = Work divided by _________.

• Velocity

• Force

• Distance

• Time

Standard unit for Power

• Ampere

• 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

Tags

NGSS.HS-PS2-1

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

• Power = force/velocity

• Power = force * velocity

• Power = force + velocity

• Power = velocity / force

What is the equation used for calculating electrical power

• P = I/V

• P = I + V

• P = V/I

• P = I * V

If it takes 10 J of work to climb up the stairs in 5 seconds

• 2 W

• 5 W

• 150 W

• 200 W

What will be the current drawn by an electric bulb of 1000 W when it is connected to a source of 220 V?

• 4.55 A

• 28800 J or 28.8 KJ

• 80 W

• 200 W

Tags

NGSS.HS-PS2-5

Watt is equal to one ____________

• joule per second

• meter per second

• ampere per second

• farad per second

If a light bulb is switched on for 20 s and it consumes 2400 J of electrical energy then it's power is

• 60 W

• 70 W

• 80 W

• 90 W