What is the function of movable pulley?
To reduce the effort needed to move a load
Which is bigger, the wheel or the axle?
The wheel
What you can conclude about the way to reduce the effort to lift the load?
The effort to lift the load is reduced when the fulcrum is placed closer to the load.
Identify the effort, fulcrum and load!
Less .......... is needed if we use an inclined plane to reach a higher lever.
effort
How does the nutcracker make it easier for us to do work?
The nutcacker reduces te effort needed to crack a nut by multiplying the force applied
If the smaller gear turn in a clockwisse direction, in what direction will the bigger gear turn?
Anti-clockwise direction
What is the type of simple machines of this tools? Identify the effort, fulcrum and load!
What's the name of this example of an inclined plane?
A ramp
The bigger gear has more teeth than the smaller gear. When the bigger gear turns one round, how does it affect the smaller gear?
The smaller gear will turn more than one round with every turn of the bigger gear. This means that the smaller gear turns faster than the bigger gear.
What can you conclude about this way to reduce the effort to lift the load?
The effort to lft the load is reduced when a longer lever is used.
Draw which one shows the wheel and axle!
What are gears?
Simple machine that have wheels and teeth
Mention the function of fixed pulley!
To change the direction of the force applied (effort)
What happens to the bigger gear when we turn the smaller gear?
the bigger gear will also turn but in the opposite direction.
What was done to enable the load to be lifted in diagram B?
The fulcrum was moved closer to the load.
A pulley system used on ship is usally called ... and ...
a block and takle
What was done to enable the load to be lifted in Diagram D?
A longer lever was used to lift the load.
What type of simple machines is this?
1st class lever
Which moved a greater distance, the wheel or the axle?
The wheel
Point out which one is the wheel and axle!
Point it out!
The wheel ...... the force applied to move the load and axle.
Multiplies
What makes the gears turn together?
The teeth of the gears interlocking as they turn.