Work, Force, Power, MA, and Efficiency quiz

An object has a weight of 200 N and is moved 3 meters.  How much work is done?

• 66.7 J
• 600 J
• 203 J
• 0.015 J

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A light bulb consumes 100 Watts. If it is left on for 20 seconds, how much work does it do?

• 5 J

• 2,000 J

• 0.2 J

• 100 J

Efficiency is....

• measured in Joules.
• a percentage.
• measured in Watts.
• measured in Newtons.

To find the amount of work done on an object, you must

• divide force and power

• divide force and distance

• multiply force and power

• multiply force and distance

Which of the following is NOT an example of work being done?

• Lifting a weight above your head

• Carrying a box up the stairs

• Pushing furniture across the room

• Pushing downward on a table that is not moving

We can calculate power by

• multiplying work and time

• dividing work by time

• multiplying force and work

• dividing force by work

How much work is done by lifting an object with a weight of 250 N a total of 2 m off the ground?

• 125 J

• 125 W

• 500 W

• 500 J

An engine does 300 J of work in 10 seconds. How much power did it use?

• 3000 N

• 3000 W

• 30 W

• 30 J

If a car weighs 3000 N and drives a distance of 10 m in 2 seconds, how much power does it use?

• 1,500 J

• 60,000 W

• 15,000 W

• 6,000 J

What is the efficiency of a car that has enough fuel to drive 600 miles, but only actually drives 150 miles?

• 25%

• 4%

• 400

• .25