It takes four barbarians to turn the wheel below. How many barbarians would it take if the wheel radius were doubled and the axle radius stayed the same?

A. Fewer than four barbarians.

B. Exactly four barbarians.

C. More than four barbarians.

D. Not enough information.

Question

Reina Park

Physics

14 February, 09:55

It takes four barbarians to turn the wheel below. How many barbarians would it take if the wheel radius were doubled and the axle radius stayed the same?

A. Fewer than four barbarians.

B. Exactly four barbarians.

C. More than four barbarians.

D. Not enough information.

+5

Answers (2)

Know the Answer?

Yasmine Lambert · Answer 1

A. Fewer than four barbarians.

Explanation:

Mechanical advantage = wheel radius / axle radius

If the wheel radius doubles and the axle radius stays the same, then the mechanical advantage doubles. That means the effort force is half. So we expect it would take half as many barbarians to turn the wheel.

Diego Allison · Answer 2

Diego Allison 14 February, 10:25

0

B. Exactly four barbarians

It takes four barbarians to turn the wheel below. How many barbarians would it take if the wheel radius were doubled and the axle radius stayed the same?A. Fewer than four barbarians.B. Exactly four barbarians.C. More than four barbarians.D. Not enough information.

It takes four barbarians to turn the wheel below. How many barbarians would it take if the wheel radius were doubled and the axle radius stayed the same?

A. Fewer than four barbarians.

B. Exactly four barbarians.

C. More than four barbarians.

D. Not enough information.