First Law
This law states an object in motion will stay in motion unless acted on by what ?
Unbalanced Force
Formula?
A push or a pull is known as
Force
Which Law: A soccer ball will not move until kicked
1st
State Newton's Third Law
For every action, there is an equal and opposite reaction
What is the term for an object's resistance to changing its motion
Inertia
Newtons (N)
Forces that are equal and opposite and cause no motion are called
Balanced Forces
Why does an empty Shopping cart accelerate faster than a full one
Less Mass- more acceleration for the same force
When you push on a wall and it " Pushes Back" what is this an example of
Action- Reaction Forces
Why does a rolling ball on Earth eventually stop
Friction
If you increase force but keep mass the same, what will happen to acceleration?
It will Increase
What do we call the rate at which an object changes speed or direction
Acceleration
Explain why when you jump you ride upward
You push into the ground the ground pushes up with equal force
Why Can Rockets move in space even with no air
They push gases downward, gases pushes them upward
Which Object has more inertia: A bowling ball or a Tennis Ball
Bowling Ball- More mass = more inertia
a 10kg rock accelerates at 2m/s^2. calculate the force
20 N
Forces are _____ in magnitude but _______ in direction.
Equal, opposite
A car going 60 suddenly slams on the brakes. Why did my water bottle fly forward
Inertia
Explain the action and reaction forces of a hammer hitting a nail.
Hammer pushes nail, nail pushes hammer
Explain why passengers move forward when a car suddenly stops
their bodies keep moving due to inertia until a force stops them
A car needs 3000N of force to accelerate. If its mass is 1000kg, what is its acceleration?
3 m/s^2
Name the two key factors that oppose motion on earth
Friction and Air Resistance
Explain How all three laws apply when kicking a soccer ball
1st- ball no move till kick
2nd- Hard kick, ball accelerate more
3rd- ball pushes back on foot = force
Why don't action- reaction forces cancel out
they act on different objects