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

This topic contains a solution. Click here to go to the answer

Author Question: A block and tackle has a 7:1 mechanical advantage. To lift a load of 600 lbs one foot, an effort ... (Read 27 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

Need homework help now?

Ask unlimited questions for free

Ask a Question

Marked as best answer by a Subject Expert

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

« previous next »

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.