What’s a Force?
What pulls things down to the ground?
Gravity
What do levers help us do?
Move or lift things more easily
What do gears have on the edges?
Teeth
Finish the sentence: A force multiplier helps you lift...
Heavy things more easily
How many simple machines are there?
Six
What is a push or a pull called?
Gravity
What do we call the part the lever turns on?
Fulcrum
If one gear turns right, which way does the next gear turn?
Left
Finish the sentence: A speed multiplier makes something...
Move faster
What kind of simple machine is a ramp?
An inclined plane
What force makes it harder to slide something?
Friction
What are the three parts of a lever?
Load, effort, fulcrum
What do you call the gear in the middle that makes the first and last gears turn the same way?
Idler gear
Is a lever usually a speed or force multiplier?
Force multiplier
Name two simple machines.
Pulley and lever
A ball is sitting still. What kind of force is needed to make it move?
An unbalanced force
If you move the fulcrum closer to the load, what happens?
It gets easier to lift the load
A small gear turns a big gear. What happens to the big gear?
It turns more slowly but with more force
Why would a cyclist use a low gear on a steep hill?
To make pedalling easier — more force with less effort
Match each: Pulley, Lever, Inclined Plane → Flagpole, Scissors, Ramp
Pulley = Flagpole, Lever = Scissors, Inclined Plane = Ramp
A trolley starts rolling faster. What does this tell us about the forces acting on it?
The forward force is stronger than the backward force (unbalanced force).
Explain how a wheelbarrow is a force multiplier.
The load is close to the fulcrum, so the long effort arm makes it easier to lift heavy things.
You want a machine to go fast. What kind of gear setup do you use?
A large gear turning a smaller gear (speed multiplier)
How does a speed multiplier make something faster but harder to push?
Because you use more effort to get more speed out the other side
You need to lift something heavy. Which simple machine would help, and why?
Lever or ramp – makes lifting easier by spreading out the force