Work, power, and machines rev

A simple machine makes work _____________ not _____________

• less, easier

• easier, less

• more, harder

• harder, less

IMA is usually ________ than AMA because IMA does not involve friction

• higher

• lower

• the same

What class lever is a pair of scissors?

• 1st

• 2nd

• 3rd

A force of 20 N is used to push a table across the floor a distance of 9 m. Find the work done

• 180 J

• 180 N

• 2.22 J

• 2.22 N

Tags

NGSS.MS-PS2-2

How much time will it take for a 400-watt machine to do 50 Joules of work

• 0.125 J

• 0.125 s

• 8 J

• 8 s

What class lever is shown?

• 1st

• 2nd

• 3rd

What is the AMA of the lever shown?

• 0.4

• 4

• 2.5

• 0.25

What is the IMA of the lever shown?

• 0.4

• 4

• 2.5

• 0.25

Determine the effort force required to lift the weight in the pulley

• 100 N

• 150 N

• 10 N

• 50 N

Tags

NGSS.MS-PS2-2

What is the AMA of the ramp

• 0.4

• 2

• 2.5

• 0.5

Tags

NGSS.MS-PS2-2