Newton's 1st Law
What is Newton's 1st Law also called?
Law of Inertia
What is the other name for Newton's 2nd Law of Motion?
The Law of Acceleration
What is the opposite of an action?
Reaction
What does motion mean?
To move
A soccer ball is sitting still. What must happen to make it move?
A force must be applied, such as kicking or pushing it.
An object at rest stays at _______.
rest
What happens to an object's motion when more force is used?
It increases the object's acceleration. (Speeds up)
A swimmer pushes water backward. Which way does the water push the swimmer?
forward
What is friction?
A force that happens when surfaces rub together (slows objects down)
A skateboard slows down after you stop pushing. What force causes it to slow down?
Friction
A moving object tends to keep moving unless a ______ acts on it.
force
Which object is easier to push: a light box or a heavy box?
Light box
A balloon releases air backward. What direction does the balloon travel.
The balloon moves forward.
What is a force?
A push or a pull
Name one of Newton's Laws that describes this scenario:
A lighter cart accelerates more than a heavier cart when the same force is used.
2nd Law
An object in motion stays in _______, unless acted on by an outside force.
motion
Which will accelerate more: a small ball pushed with 10 N or a large ball pushed with 10 N?
The small ball
Forces always act in _______. (Hint: think gravity and normal force)
pairs
What is the difference between speed and velocity?
Speed tells how fast something moves; velocity tells speed and direction.
Name one of Newton's Laws that describes this scenario:
A hockey puck stays at rest until it is hit.
Newton's 1st Law
Explain Newton's 1st Law using a soccer ball.
A soccer ball stays still until a force, such as a kick, makes it move. Once moving, it keeps moving until another force, such as friction, slows it down.
What is the equation for Newton's 2nd Law of Motion?
F=ma Force=Mass x Acceleration
For every _______, there is an equal and opposite _____.
action, recation
What are the 3 ways motion can change?
1. Speed Up
2. Slow Down
3. Change Direction
Name one of Newton's Laws that describes this scenario:
A rocket expels gas downwards, and in reaction the rocket moves upwards.
Newton's 3rd Law