Ch 7 Sec 1 Work and Machines

The unit used to measure work is the 

• Watt
• Newton
• Joule
• meter

A force exerted over a distance to move an object is ______________________.

• power
• work
• momentum
• Watt

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

• doing homework

• lifting a box

• pushing a stationary box

• holding a box

A 5000N block is lifted 10 m. How much work was done?

• 50000 J
• 5000 J
• 500 J
• 50 J

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-2

Force is a _____ or _______

• simple    complex
• push     pull
• up      down
• in      out

Tags

NGSS.MS-PS2-1

In which of these cases is work being done? 

• A student sleeps
• A student pushes a locked door that does not move
• a student carries his chair into another room
• A student sits on the carpet

The amount of work done in a certain amount of time is known as 

• work
• effort force
• resistance force 
• power

 Work done = Force x _________

• a. distance
• b. acceleration
• c. velocity
• d. speed

Force is measured using which type of unit?

• Meters
• Kilograms
• Newtons
• Joules

Tags

NGSS.HS-PS2-1

What has to happen when a force is exerted on an object for work to be done?

• the object moves
• the object stays still
• the object is heavy
• none of these