Definitions
What It Does
Mechanical Advantage
Everyday
100
What is a pulley?
a kind of wheel on an axle over which a rope, belt, cable, or chain passes. Most have a groove to hold rope in place.
100
Wha is the advantage of a fixed pulley?
It changes the direction of the effort force used to lift the load.
100

What is a block and tackle?

combined pulleys (fixed and moveable) to increase force.

100

Name something that uses a pulley

blinds, exercise equipment, elevator, flag pole 

200

This pulley moves with the load being lifted

Movable

200

What is the disadvantage of a fixed pulley?

the effort force is equal to the load force. You have to use as much effort as the weight of the object.

200

Name 3 parts of a pulley

rope, wheel, load

200

What is force

A push or pull.

Forces start or stop objects moving, change the speed or direction of objects,change the shape of objects

300
what is a fixed pulley?
a pulley that is attached to a structure and does not move
300
What is the advantage of a moveable pulley?
You only have to pull with half of the effort force to lift the load
300

Name the 2 types of pulleys in a compound pulley

fixed and movable

300

How many wheels does a simple pulley have

one

400
What is a moveable pulley?
a pulley that is not fixed in place. It moves with the load.
400

Do more pulleys give a higher or lower mechanical advantage

higher

400

Do more pulleys give a higher or lower mechanical advantage

higher

400

what is the advantage of using fixed and moveable pulleys together?

get mechanical advantage from a moveable pulley (cutting the weight of the load in half) and changes the direction of force (pull down rather than pull up)

500
What is mechanical advantage?
an advantage that a machine can give us by making it easier for us to do something.
500
When you lift a mass of 100kg with a single moveable pulley system, you apply a force of 50kg. Explain why.
The moveable pulley cuts the effort force in half as the moveable pulley moves with the load it supports the load making it lighter.
500

The more pulleys the ______ it is to lift a load.

eaier

500

Does a block and tackle pulley change the direction, or amount of force or both

both

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