What is force measured in?
Newtons
What is mass measured in?
kg, kilograms
What are the two forces that stop an object in motion?
Gravity, friction
How do we describe force?
A push or a pull
When two teams are playing tug of war and neither team wins. What is said of the forces?
They are balanced
What is Gravity?
Gravity is an invisible force that pulls everything to the center of the earth
What would happen without Gravity?
People (and everything else on Earth) could just float away into space.
How does Gravity affect things that are thrown in different directions?
Gravity pulls things down no matter what direction they are traveling.
Is there a force of attraction (gravity), between the Sun, Earth, and the moon?
Yes, that is the reason they do not fly off, and they remain in their orbit
The more matter something has, the less the force of its gravity. is this true or false?
It is false because The more matter something has, the greater the force of its gravity.
Who discovered gravity?
Isaac Newton
What 2 things affect gravity?
Mass and Distance
What is the type of force when 2 surfaces rub together?
Friction
If two identical boxes were pushed on Cement road, and other on Ice , which will move faster and why?
The force of friction between the box and the ice is less than the force of friction between the box and the cement. Box on Ice moves faster
How does rubbing two sticks cause a fire?
The force of friction between the sticks creates heat, and when it gets hot enough , a fire starts
