1
Which pulley system is attached to a fixed point and only changes force direction?
Fixed Pulley
What consists of a large wheel attached to a smaller shaft?
Wheel and Axle
Define a Compound (Complex) Machine.
A machine made of two or more simple machines working together
What does MA stand for in physics?
Mechanical Advantage
How much does a single movable pulley reduce the required effort force?
Cuts it in half (by 50%)
What are toothed wheels connected together to transfer motion or change speed?
Gears
Which simple machines combine to make a Can Opener?
Lever + Wheel & Axle + Gears (or Wedge)
Write the formula for Mechanical Advantage (MA).
Output Force Load /Effort Force Input
What is a compound system that combines both fixed and movable pulleys called?
Block and Tackle
Give two real-life examples of a Wheel and Axle.
Doorknobs, Steering Wheels, or Screwdrivers
Which simple machines are combined to build a Construction Crane?
Lever (boom) + Pulley system
If you apply an effort force of 10 N to lift a load of 40 N, what is the MA?
{MA} = (40 / 10)
= 4
How do you easily find the Mechanical Advantage (MA) of a block and tackle system?
By counting the number of rope segments supporting the movable pulley
In a Windlass machine (used to pull water from wells), what acts as the fulcrum or pivot point?
The center of the axle
Which three simple machines work together in a Car Jack?
Lever + Screw + Wheel & Axle
What instrument or tool do we use to measure force in Newtons during science experiments?
Answer: Spring Scale
If a block and tackle system has 4 supporting ropes, what is its Mechanical Advantage (MA)?
MA = 4
Why is a Windlass considered a modified lever?
Because it rotates continuously in a circle instead of moving up and down
How do simple machines interact inside a compound machine to move a load?
One simple machine's output force powers the next simple machine
Why does pulling a sled on wet sand require less force than on dry sand?
Because water binds sand grains together, creating a smoother surface with less friction