Definitions
Speeding up, slowing down, or changing directions is called...
acceleration
For every action, there is an equal but opposite reaction.
Newton's 3rd law
What is Newtons first law?
Any object in motion stays in motion unless an unbalanced force acts on it.
What is the definition of acceleration?
speed up, slow down, change direction
or the change in an object's velocity.
What is Newtons third law?
For every action there is an equal/opposite reaction.
Speed in a given direction is called ...
velocity
You can throw a tennis ball a lot faster and farther than a basketball
Second Law of Motion
What is the Newtons first law usually called as?
Inertia
What is the formula for Newton's 2nd law?
F=ma
F=Net force, M=Mass, A=Acceleration
What is an example of Newton's third law we saw demonstrated in class?
Newton's cradle
Balloon rockets
A force acting on an object which can slow it down is ...
friction
A larger force on an object will give the object a larger acceleration. Which law?
Newton's 2nd Law of Motion
The natural tendency to resist change in motion is called...
inertia
If you push two objects with the same force—a soccer ball and a bowling ball—which one will move faster? Why?
the soccer ball, because with less mass, it accelerates more when the same force is applied
Another name for Newton's Third Law is...
action/reaction
The unit used to measure force is the...
Newton
If I push on the wall, the wall pushes back on me with an equal force.
Newton's 3rd law
Which object has more inertia? A cow or a small dog?
A cow because it has more mass.
If two students pull wagons with the same force, but one wagon is loaded with books and the other is empty, which will move slower? Why?
The loaded wagon moves slower because it has more mass, so it accelerates less.
If a rocket engine pushes with a lot of force down, then.....
the rocket will be pushed up with a lot of force.
Forces that are equal in strength and opposite in direction that cause no movement are...
balanced forces
An object at rest wants to stay at rest.
Newton's 1st law
Which has less inertia? a bowling ball or a tennis ball?
a tennis ball because it has less mass
If you use the same amount of force to push a shopping cart and a car, which one will accelerate more? Why?
The shopping cart will accelerate more because it has much less mass
When you jump forward off a small boat, the boat moves...
backward