Work, Power, and Mechanical Advantage

If the weight of the block is 10N, how much force does one have to apply to lift it using this pulley (MA=2)?

• 2N
• 5N
• 10N
• 15N

Tags

NGSS.HS-PS2-1

Force is a _____ or _______

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

Tags

NGSS.HS-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

Tags

NGSS.MS-PS3-5

Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?

• 1
• 10
• 100
• 1000

 Work done = Force x _________

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

What is power?

• time it takes to do work
• work
• machine

A machine is a device that____________.

• changes either the size or direction of force
• always makes lifting objects require more effort
• changes only magnitude of the force
• changes only direction of the force

Tags

NGSS.MS-ETS1-1

True or False: No machine is 100 % efficient.

• True
• False

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-4

What is the equation for determining Mechanical Advantage?

• input distance/output distance
• output force/input force

What is the definition for mechanical advantage?

• the number of times a machine increases the input force
• the number of times a person can lift a weight
• how much work is done in a given amount of time
• the rate of doing work

Tags

NGSS.MS-ETS1-2