Work

How is work defined?

• the amount of energy 
• the transfer of force over a distance
• rate of work in a given time
• the change in distance in a given time

What is the equation for work?

• W = mass * acceleration
• W = force * distance
• W = force/distance
• W = speed/time

What is the unit of measurement for work?

• Newtons
• Joules 
• Watts
• Meters

Which of the following is an example of work being done?

• Teacher sitting in a chair
• Book resting on desk
• Keys hanging from a key chain
• A ball being rolled on the floor

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

• Pushing a cart in a store
• Shooting a basketball
• A stand off in tug of war
• Running a mile

If a boulder is lifted by a forklift a distance of 10 meters with a force of 30 Newtons. How much work is being done?

• .333 Joules
• 3 Joules
• 300 Joules
• 60 Joules

If a student uses 10 Newtons of Force to push a chair 5 meters, how much is work is being done?

• 2 Joules
• .5 Joules
• 50 Joules
• 20 Newtons

If a lion drags his prey 10 meters to his den doing 500 joules of work, how much force did he use?

• 50 Newtons
• 500 Joules
• 50,000 Newtons
• 10 Newtons

It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box in Joules?

• 200 J
• 20.0J
• 100 J
• 10 J

All of the following describe situations in which work is done by an organism EXCEPT for which situation?

• A bird carries a worm to it's nest
• A squirrel hides a nut in a tree
• Ants bring crumbs into their homes
• Leaves decompose on the forest floor