Newton's 1st Law
What is Newton's 1st Law also called?
Law of Inertia
What 3 things are related by Newton's 2nd Law?
Mass, Force, Acceleration
What does Newton's 3rd Law state?
For every action, there is an equal and opposite reaction.
A force is defined as what?
A push or pull on an object
Which law explains why it is easier to push an empty shopping cart instead of a full one?
The 2nd Law
What is inertia?
The tendency of an object to resist a change in motion
What is the formula for Newton's 2nd Law?
F=MA
When you jump off the ground, what force pushes on you?
The ground pushes upward on you.
What unit is used for measuring force?
N (Newtons)
Which law explains why a bird flies by pushing air downwards?
The 3rd Law
An object at rest will stay at rest unless what happens?
An unbalanced force acts on it.
If you increase the force on an object while it's mass stays the same, what happens to acceleration?
It increases
A swimmer pushes the water backward. What does the water do?
It pushes the swimmer forward.
What happens when balanced forces act on an object?
There is no change in its motion.
Which law explains why your body moves backward as a roller coaster launches forward?
The 1st Law
A ball sitting on the ground doesn't move until someone kicks it. Which Law is this?
1st
A 5kg object is pushed with a force of 20N. What is it's acceleration?
4 m/s
A rocket pushes gases downward. What happens to the rocket?
It moves upward
What happens when unbalanced objects act on an object?
The object accelerates or changes its motion.
Which law explains why a baseball accelerates after being hit with a bat?
The 2nd Law
A passenger moves forward when a car suddenly stops. What causes this?
Inertia
Two objects are pushed with the same force. One is 5kg the other is 10kg. Which one will accelerate faster?
The 5kg object
A student says that the action force is always bigger than the reaction force. Is this true? Explain
No, the forces are always equal and in opposite directions.
A box is pushed with 50N to the right and 30N to the left. What is the force?
A skateboarder pushes backward against the ground while moving forward. Which law explains this?
The 3rd Law