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

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

50 J of work is done lifting a 2.0 kg book in the air. How high was it lifted?

• 2.6 m

• 3.6 m

• 1.0 m

• 25 m

Tags

NGSS.MS-PS3-2

How much energy is expended when a 10.0 kg box is moved 2.0 m?

• 20.0 J

• 5.0 J

• 0.20 J

• 2.5 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What are two things required for work to be done? Check all that apply.

• Force

• Distance

• Constant Speed

• Momentum

At which point on the roller coaster is the kinetic energy at its maximum?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

 Work done = Force x _________

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

Force is a _____ or _______

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

Tags

NGSS.MS-PS2-1

How much work is produced when 350 N is used to move a car 5 m?

• 70 J
• 1750 J
• 355 J
• 175 J

P=25 watts 
W=5000 Joules 
t=???

• 200 sec
• 0.0005 s
• 125000 s
• 125 s