work and power

Which of the following is a true statement about work?

• It measures how quickly an object accelerates 
• It measures how much effort is applied over a certain distance
• It measures the change in an object's rate of speed
• It measures how much time it takes to move a massive object

What does one newton exerted over a distance of one meter equal?

• One watt
• One hertz
• One volt 
• One joule 

Which of these is a measure of force?

• 100 newtons
• 100 meters per second
• 100 joules
• 100 watts

True or false
You do work only when you exert a force on an object and move it

• true
• false

Two factors that determine work are

• size of the force, and distance
• size of the force, and type of force
• mass, and distance

work is a measurement of how much force is applied over a certain

• distance
• velocity
• shape
• size

units for work are

• netwons
• joules
• meters
• seconds

work transfers

• sweat
• energy
• velocity
• effort

The unit used to measure power is the 

• Watt
• Newton
• Joule
• Newton*meter

Which of the following is the best example of work being done.

• doing homework

• lifting a box

• pushing a stationary box

• holding a box