Newton's 1st Law
State Newton's First Law
An object in motion maintains its velocity unless an unbalanced force acts upon it.
According to Newton's Second Law, what is the equation?
Force = Mass x Acceleration
How do action/reaction forces occur?
At the same time! As soon as a force is applied to an object (action force), the reaction force is applied at the same time!
This term describes the vertical, downward force exerted on a mass as a result of gravity.
What is weight?
What is terminal velocity?
The speed when an object stops accelerating and falls with the same speed--when weight and air resistance are equal.
If an object has more mass, it has __________ inertia.
More
According to Newton's Second Law, what happens to force is mass is cut in half?
Force is cut in half.
For every force that object A applies on B, object B pushes _______ amount of force back, but in the opposite direction, of object A.
equal
This terms describes the force of attraction that exists between two masses separated by a distance.
What is gravity?
What is the unit for momentum?
kg x m/s
The tendency of an object to maintain it's motion is _______________
Inertia
If you apply a greater force to the same object, what happens to the acceleration?
The acceleration increases
Using the example of a swimmer, describe how you move in water.
A swimmer applies their force to the water (backwards), the water applies a force to you (forward) and forces on you are no longer balanced and you are propelled forward.
This is the constant (number AND UNIT) used for acceleration when calculating our scientific weight on planet Earth.
9.8 m/s2
What factors influence terminal velocity?
Weight and air resistance (shape and surface area)
This term means a push or a pull.
What is force?
What is acceleration measured in?
m/s2
What happens to the force back on you if you hit the wall harder?
The force applied to you is harder.
This is the weight (NUMBER AND UNIT) of a person whose mass is 55 kg and is standing on planet Earth.
539N
What 2 factors is gravity dependent on?
Distance and mass
Explain how the penny lab demonstrated Newton's 1st Law of Motion.
When a large force is applied to the notecard, it is not directly applied to the penny. Therefore, relative to the cup, the penny doesn't move--it stays at rest and falls into the cup.
This is the acceleration of an object that weights 56 kg is pushed by an unbalanced force measuring in at 140 N.
What is 2.5 m/s2?
If you are skating across the floor, what force is being applied at the same time.
Friction--opposing motion
These are the standard units used for describing the values of Force, Mass, and Acceleration when using Newton's Second Law of Motion.
newtons (N), kilograms (kg), and meters per second squared (m/s2)
Explain what happens to a person's weight if they go to Jupiter and why this happens
The person's weight increases because weight is a force equal to mass times free-fall acceleration. Free-fall is much greater on Jupiter (26.0 m/s2), so weight increases.