May the Force be With You
An object moves in the direction of the ________________force. (greater or less)
greater
What playground toy is a lever?
A see saw.
Give 2 examples of a wedge.
Axe, door stopper, scissors, knife, saw, shovel.
Give 2 examples of a wheel and axle?
Wagon, automobiles, skateboards, trains, carts, water wheels, propellers, spinning wheel, ships steering wheel.
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?
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 kind of surfaces cause friction?
Rough surfaces cause friction.
what instrument measures force
spring scale
what is an important point or part on a lever?
The fulcrum.
What is a wedge used for?
A wedge helps to split or separate 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.
what two words describe force
push and pull
give 2 examples of an inclined plane.
Ramp, slide, stairs, screws, slope, escalator
What are pulleys used for?
Pulleys are used to lift or lower heavy loads.
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.
The amount of force needed to do work is called
effort
An incline plane increases distance, but decreases what?
Force
what are the two parts of a pulley?
wheel and rope/wire/cable
what is the axle part of the wheel and axle?
The axle is a smaller wheel or a rod attached to the wheel.
What causes objects to have weight?
Gravity.