1
Balanced forces are opposing forces which prevent ______ from being done.
Work
A ________ is when two objects bump into each other.
Collision
What is the push or pull on an object called?
Force
What happens to an object's speed during a collision?
It changes. The speed either increases or decreases.
An example of friction is ____ objects rubbing against each other.
Two
An object in motion will move in a __________ at a constant speed unless acted upon by an unbalanced force.
A. Straight line
B. Curve
Straight line
What is the property of matter that makes it resist a change in motion?
Inertia
Mass, speed, and direction are all part of an object’s moving ________.
Energy
An object at rest will _________ unless acted upon by an unbalanced force.
A. Move
B. Stay at rest
Stay at rest
When something has been moved, this has happened.....
Work
OPPOSITE poles of a magnet ________.
A. Attract
B. Repel
Attract
_________________ was the scientist who discovered the laws of motion.
A. Benjamin Franklin
B. Sir Isaac Newton
Sir Isaac Newton
What is a force that works against motion along a surface?
Friction
LIKE poles of a magnet _______.
A. Attract
B. Repel
Repel
The greater the ________ of an object, the more inertia it has.
A. Volume
B. Mass
Mass
Sound energy, Heat energy