Booklet 2 Making Machines

Question 1

Archimedes said given that given a long enough lever he could lift the earth
What did he mean by this statement in terms of effort and load

Answer 1

He ment that his small effort could lift a massive load if the lever was long enough and the pivot very close to the earth/load
The pivot must be at the furthest end of the lever from you

Question 2

How do you calculate moment

Answer 2

Force x distance

Question 3

How do you calculate force

Answer 3

Moment divided by distance

Question 4

How do you calculate distance

Answer 4

Moment divided by force

Question 5

What two things can a gear system change

Answer 5

Speed
Direction

Question 6

What type of gears meet at an angle

Answer 6

Bevel gears

Question 7

What type of gear uses a screw

Answer 7

Worm gear

Question 8

How are gears and wheels similar

Answer 8

They both turn on an axle

Question 9

How are gears and wheels different

Answer 9

Gears have teeth wheels don’t

Question 10

How do you calculate the force when a pulley is used

Answer 10

Divide the weight by the number of ropes on the pulley