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 unit of measurement for work?

• Newtons
• Joules 
• Watts
• Meters

Tags

NGSS.HS-PS3-2

What is the equation for work?

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

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

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

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 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

Tags

NGSS.MS-PS3-5

If a bowling ball weighing 5 kg is dropped from a 30 meter tall building, how much work is being done if the acceleration due to gravity is 9.8 m/s^2 (Hint: F = m*a) 

• 1,470 Joules
• 150 Joules
• 49 Joules
• 294 Joules

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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

Tags

NGSS.MS-PS2-2

In which of the following situations do your arms do work on books?

• holding a heavy stack of books while standing
• carrying a heavy stack of books
• dropping a stack of books onto a table
• picking up a pile of books from the floor

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

• 15 J
• 45 J
• 0 J
• 5 J