Calculating Work and Power Concepts

What are the two main calculations discussed in this unit?

• Speed and Velocity

• Work and Power

• Energy and Time

• Force and Distance

Tags

NGSS.MS-PS3-1

What is the formula for calculating work?

• W = F - D

• W = F + D

• W = F / D

• W = F * D

Tags

NGSS.MS-PS3-5

What is the unit of work?

• Watts

• Meters

• Newtons

• Joules

Tags

NGSS.MS-PS2-2

If a 21 Newton weight is lifted 0.42 meters, how much work is done?

• 11.42 Joules

• 10.82 Joules

• 9.42 Joules

• 8.82 Joules

Tags

NGSS.HS-PS3-2

How high should a 420 Newton person climb to do 1270 Joules of work?

• 2.0 meters

• 5.0 meters

• 3.0 meters

• 4.0 meters

What is the formula for calculating power?

• P = W - T

• P = W * T

• P = W / T

• P = W + T

What is the unit of power?

• Newtons

• Meters

• Joules

• Watts

If a 51 Newton weight is lifted 0.58 meters in 0.319 seconds, what is the work done?

• 20.58 Joules

• 25.58 Joules

• 29.58 Joules

• 35.58 Joules

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Using the previous work calculation, what is the power expended?

• 82.7 Watts

• 87.7 Watts

• 92.7 Watts

• 97.7 Watts

Where is the unit 'watt' commonly seen in everyday life?

• On a clock

• On a speedometer

• On a thermometer

• On a light bulb