gears and more levers

Question 1

what is a gear

Answer 1

a rotating machine with cogs that mesh with another toothed part to transmit a moment

Question 2

what do gears act as

Answer 2

a force multiplier

Question 3

what’s a force multiplier

Answer 3

machines designed to increase the size of a force

Question 4

what’s a distance multiplier

Answer 4

machines designed to increase the distance or speed with which something moves

Question 5

how is a bike an example of a distance or speed multiplier

Answer 5

slow movement of pedals produces much faster rotation of wheels

Question 6

Why can a machine not be a force and distance multiply at the same time

Answer 6

As energy is conserved, if force is doubled the distance is hard and vice versa

Question 7

what r levers used to do

Answer 7

Lift heavy masses with the least amount of effort

Question 8

What three things can wheels do when passing power from wheel to another

Answer 8

• Increase speed - first gear has more teeth than second so second has to turn faster to keep up
• Increase force - second gear has more teeth than first so second turn slower but with more force
• Change direction - when gears mesh they always turn in the opposite direction

Question 9

In a hydraulic system a smaller force on the master (effort) piston will produce what force on the slave (load) piston

Answer 9

A larger force as the pressure of the liquid is constant - acting as a force multiplier

Question 10

What is the ratio of In levers

Answer 10

Lengths

Question 11

What is the ratio of In gears

Answer 11

Number of teeth