Y10 Machines

Which of the following correctly defines what a pulley system can do?

• It can change the direction of the force

• It can increase the output force

• It can minimise the input force

• All of the above

What does the pulley system shown do to the force?

• The force is multiplied

• Only the direction of the force is changed

• The number of supporting ropes determine how much the force increases by

• The force is divided

In the pulley system the effort force exerted on the load is 20 N. If the machine is moved by a distance of 20 cm, by what distance does the load (the bucket) move?

• 20 cm up

• 20 cm down

• 400 cm up

• 400 cm down

Which of the following behaves most like a first-class lever, with the fulcrum between the force and the load?

• A moveable pulley

• A single fixed pulley

• Tweezers

• A wheelbarrow

What is the ideal mechanical advantage of this pulley system?

• 1, because only the direction of the input force is changed

• 2, because there are two ropes supporting the load

• 3, because there are three ropes supporting the load

• 0, because the effort and load forces are balanced

The greater the number of pulleys in a mechanical system, the less efficient it becomes because there is more friction caused and energy is lost to heat.

• True

• False

Which gears move in the same direction

• red and orange

• red and blue

• orange and blue

• red orange and blue

What is the name given to a system of gears working together?

• lever

• gear truck

• gear train

• pulley

What is the orange : green gear ratio?

• 4:1

• 2:1

• 1:4

• 1:2

What will happen to the seesaw?

• It will turn anticlockwise

• It will turn clockwise

• It will remain level