Friction A
What is the force that opposes motion between to surfaces that touch?
Friction
What kind of friction wherein the object is not in motion?
Static Friction
What pulls objects toward each other?
Gravitational Force
What will happen if there is no gravity?
Everything will float.
How do you create friction in a book?
You create friction when you push a book.
What kind of surface do you see a friction?
Rough surface
What is the kind of friction that tries to slow objects down when they move through a liquid or a gas?
Fluid Friction
When do you say that an object has a small gravitational force?
If the object has a small mass.
What is the amount of matter in an object?
mass
What will happen if you drop a football and a tennis ball at the same height and time?
They will hit the ground at the same time.
How do you create more friction?
You create more friction when you apply greater force.
What is put on the bicycle so that friction will be lessened?
brakes on bicycle
What do objects with large masses have?
Large gravitational force
What is the unit of measure for mass?
kilograms
How do you decrease friction?
Make the surface smooth.
What kind of friction opposes the movement of objects?
Sliding Friction
How is friction reduced in a car?
You can reduce friction by putting lubricant.
What is Sir Isaac Newton's theory about gravity?
"Whatever that comes up must go down".
Who discovered the Law of Universal Gravitation?
Sir Isaac Newton
What planet has the most gravity?
Jupiter
What happens when there is no friction?
It will continue to move at great speed.
What do they put on basketball shoes to reduce friction?
They put rough soles on shoes.
What happens to the mass when there is an increase in gravitational force between two objects?
Mass increases between objects
How did Sir Isaac Newton discover gravity?
It was said that an apple fell down from a tree and he research on that and later found out about gravity.
What tells how heavy an object is?
Weight