Newton's 1st Law
What is Newton's 1st Law?
The law of inertia.
What is Newton's 2nd Law?
The law of acceleration.
What is Newton's 3rd Law?
The law of Action and Reaction.
What is friction?
Friction is the resistance to motion of one object moving relative to another.
If two individual forces are of equal magnitude and opposite direction, then the forces are said to be balanced.
What is inertia?
Inertia states that an object remains at rest or continues to move at a constant velocity unless acted upon by an external net force.
What is acceleration?
Acceleration is increase in the rate or speed of something.
What is action and reaction?
For every action force there is an equal and opposite reaction force.
What factors affect friction?
Surface area, mass, type of surface area.
What causes an unbalanced force?
When one force is greater than another, the forces are not balanced, they are unbalanced.
Is a balanced or unbalanced force needed to change the velocity of an object?
Unbalanced.
Fnet=
ma
Do forces come in pairs?
Always, yes
Friction between bones and joint
Unwanted
What type of force causes motion to an object?
Unbalanced
True or false, if you throw a ball in space the ball will keep going in the same direction at the same speed.
An object will accelerate in the direction of the...?
Use the Law of force pairs to explain how a car accelerates.
The cars tires grip the road and push the road backwards. The reaction force moves the car forward, the road pushes the car forward.
Is friction always necessary?
No
A bike leaning against a tree is an example of?
A balanced force
If you are in a moving car and the brakes are suddenly slammed on, what will happen to you.
You will continue to go forward, but your seat belt will hold you back.
Is the net force acting on an object equal to the product of its mass and its acceleration?
Yes
True or false, When a bug hits a car windshield it splats because the force of the car on the bug is greater than the force of the bug hitting the car.
False, the forces are equal, but the bugs tiny mass results in a huge deceleration.
Friction between tires and the road?
Necessary
A skydiver accelerating downwards is an example of ?
An unbalanced force