Question

Which of the following explains why a bicycle uses a gear?
A. The gear increases the effort force needed.
B. The gear increases resistance force.
C. The gear decreases effort force.
D. The gear decreases resistance force.

Answer 1

2. Which of the following is a compound machine?
A. a screw being screwed into a piece of wood
B. a can opener
C. a crowbar
D. a wheel and axle

Answer 2

A can opener. We have a gear assembly and a wedge to cut into the can.

Answer 3

thnk u

Answer 4

Gear decrease effort force

Answer 5

thnk u again.