May the Force be With You
What instrument measures force?
A spring scale.
True or False
A screw is an inclined plane.
True...A screw is an inclined plane that is wrapped around a pole or rod.
Give 2 examples of a wedge.
Axe, door stopper, knife, saw, shovel, teeth
Give 2 examples of a wheel and axle?
Wagon, automobiles, skateboards, trains, carts, door knobs.
Lubrication is used for what purpose?
Get rid of friction.
Force is measured in what unit of measurement?
Newtons
Is work easier or harder when the load is closer to the fulcrum on a lever?
Easier.
Give 2 examples of a pulley.
flag pole, sail boat sail, curtain or mini blind string, crane, tow truck.
What are wheels and axles used for?
They help move people and objects from one place to another.
what types of surfaces cause friction?
Rough surfaces cause friction.
Objects move in the direction of the ___________force.
(lesser, greater, equal)
greater
what is an important point or part on a lever?
The fulcrum.
What is a wedge used for?
A wedge helps to split objects or seperate objects.
Which part of the wheel and axle, is bigger, and which part is smaller?
The wheel is bigger, and the axle is smaller.
Two objects rubbing against each other is called what?
Friction.
When an object is pushed or pulled by force and moves a distance it is called what?
Work.
give 2 examples of an inclined plane.
Ramp, slide, stairs, screws, slope, escalator
A pulley contains which other simple machine?
A wheel and axle.
When moving together, which part of the wheel and axle moves a greater distance?
The wheel.
What is gravity?
Gravity is a force of 2 objects pulling on each other.
Objects do not move when ___________ force acts on them.
(greater, lesser, equal)
equal
An incline plane increases distance, but decreases what?
Force
what are the two parts of a pulley?
a grooved wheel and a rope/wire/cable
what is the axle part of the wheel and axle?
The rod which the wheel rotates around.
What is a slippery material that helps with friction?
Lubrication.