When an object changes speed or direction, it is called __________.
What is acceleration?
100
Simple machines make it easier to do _________ by lowering the force needed to move and lift heavy objects and loads.
What is work?
100
A doorknob is an example of this type of simple machine.
What is wheel and axle?
200
This non-contact force pulls an object toward the ground.
What is gravity?
200
Newton's 3rd Law of Motion states that for every ________ there is an equal and opposite ___________.
What is action and reaction?
200
An object's distance over time is known as this.
What is speed?
200
The pivot point of a lever.
What is the fulcrum?
200
This simple tool uses a wheel with a rope to move objects.
What is a pulley?
300
This force happens when two objects resist being moved against each other.
What is friction?
300
Newton's first law is also known as the law of _________.
What is inertia?
300
The speed of an object together with the direction it is traveling is called its ___________.
What is velocity?
300
This is a flat, slanted surface that makes it easier to move a heavy object to a higher level.
What is an incline plane?
300
Teeth and knives are examples of this type of simple machine.
What is a wedge?
400
For an object to be moved, the forces acting on it must be ______________.
What is unbalanced?
400
According to Newton's 2nd Law, the greater the ______ of an object the greater the force needed to move the object.
What is mass?
400
This is the name of the force that causes a moving object to slow down and eventually stop?
What is friction?
400
This simple machine is an inclined plane wrapped around a cylinder, and it holds objects together.
What is a screw?
500
(1) When forces on an object are equal and cancel each other out, they are called this. (2) Tell what happens to the object.
(1) What is balanced (forces)?
(2) What is stays at rest/ does not move?
500
Newton's First Law of Motion states that an object at ______ will stay at _______, and an object in ________ will stay in __________ unless a greater force acts upon it.
What is rest (first two blanks) and motion (second two blanks)?
500
When a car is traveling 50 miles per hour, this is how far the car will have travel in 3 hours.
What is 150 miles?
500
Name the six simple machines.
What is 1) wheel and axle
2) inclined plane
3) screw
4) pulley
5) lever
6) wedge
500
Two or more simple machines combined makes this.
Give an example and tell the simple machines that make it up.