Deck 54: Mechanical Advantage

Question 1

A 5 lb. is set 4' from the fulcrum. How far would a 10 lb. weight need to be set from the fulcrum to create a balance?

A) 5
B) 3
C) 4
D) 2

Answer 1

2

Question 2

A 20-foot long ramp leads up to a 5-foot high loading dock. The workers place a 300 lb. barrel of cooking oil on a dolly to reduce friction and push the barrel up the ramp and onto the loading dock. What is the MA of this arrangement?

A) 5:1
B) 4:1
C) 4:2
D) 3:2

Answer 2

4:1

Question 3

A 10 lb. is set 4' from the fulcrum. How far would a 20 lb. weight need to be set from the fulcrum to create a balance?

A) 5
B) 3
C) 2
D) 4

Answer 3

2

Question 4

Of what MA does a screw jack take advantage?

A) lever
B) inclined plane
C) rack and pinion
D) block and tackle

Question 5

What is the MA of a hydraulic jack with a 1/4-inch pump piston and a 2-inch output piston.

A) 55:1
B) 64:1
C) 66:1
D) 63:2

Question 6

A 25 lb. is set 5' from the fulcrum. How far would a 10 lb. weight need to be set from the fulcrum to create a balance?

A) 12.5'
B) 13.5'
C) 14'
D) 22'

Question 7

. What MA does the pulley arrangement have?

A) 4
B) 2
C) 3
D) 5

Question 8

What is the MA of a hydraulic jack with a 1-inch pump piston and a 6-inch output piston.

A) 35:1
B) 34:1
C) 36:1
D) 33:2