Types of Mechanisms

Question 1

Define a mechanism

Answer 1

Parts of an object that are designed to help us make jobs easier, this may be done by helping lift loads,changing speeds or changing direction of movement.

Question 2

What are Cams?

Answer 2

Cams change rotary motion into reciprocation motion, a follower will sit against a cam and will be the output.

Question 3

Give examples of cams

Answer 3

Examples include the offset,snail and pear shaped cams

Question 4

What are Gears?

Answer 4

Gears most common purpose is to change the direction of rotation or to change the output force, they are toothed wheels that mesh giving a positive connection.

Question 5

Define a Gear train

Answer 5

This is where gear wheels mesh together

Question 6

What are pulleys?

Answer 6

Like Gears,Pulleys are designed to either change the direction of rotation,change the speed of rotation or change the output force.

Question 7

What are levers?

Answer 7

Very effective mechanisms that are used to magnify a force.

Question 8

What are class 1 types of levers?

Answer 8

This is where the effort is at one end, the fulcrum is in the middle and the load is at the other end e.g. a tin-opener or a see-saw.

Question 9

What are class 2 types of levers?

Answer 9

This is where the load lies between the effort and fulcrum e.g. a wheelbarrow or a door

Question 10

What are class 3 types of levers?

Answer 10

In a Class Three Lever, the Force is between the Load and the Fulcrum e.g. tongs or tweezers