[Answered] A block and tackle has a 7:1 mechanical advantage. To lift a load of 600 lbs one foot, an effort ...

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Author Question: A block and tackle has a 7:1 mechanical advantage. To lift a load of 600 lbs one foot, an effort ... (Read 103 times)

cherise1989

Hero Member
Posts: 555

on: Aug 19, 2018

A block and tackle has a 7:1 mechanical advantage. To lift a load of 600 lbs one foot,
an effort force of 104 lbs must be applieD. What is the percent efficiency?

A. 17
B. 82
C. 96
D. 100

Question 2

A first-class lever is used to lift 300 lbs - output lever arm is 3 foot long; the input force is 50 lbs. What is the input lever length?

A. 0.5 feet
B. 6.0 feet
C. 18 feet
D. 100 feet

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Jayson

Sr. Member
Posts: 350

Reply #1 on: Aug 19, 2018

Answer to Question 1

B

Answer to Question 2

C

cherise1989

Hero Member
Posts: 555

Reply #2 on: Aug 19, 2018

Jayson

Sr. Member
Posts: 350

Reply #3 on: Aug 19, 2018

You're welcome

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Author Question: A block and tackle has a 7:1 mechanical advantage. To lift a load of 600 lbs one foot, an effort ... (Read 103 times)

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