Changes in Motion
This term describes a change in velocity.
What is acceleration?
Newton's First Law is also known by this name.
What is the Law of Inertia?
This is the formula that represents Newton's Second Law.
What is F = ma?
For every action, there is this.
What is an equal and opposite reaction?
This force pulls objects toward Earth's center.
What is gravity?
An object that speeds up, slows down, or changes direction is undergoing this.
What is a change in motion?
According to Newton's First Law, an object at rest will stay at rest until this happens.
What is acted on by an unbalanced or net external force?
If you double the force on an object, its acceleration will do this (assuming mass stays the same).
What is double?
When you push on a wall, the wall does this in return.
What is pushes back with equal force?
This force slows down a sliding object.
What is friction?
This law explains why a ball rolling on the ground eventually stops without being pushed.
What is Newton's First Law?
A book stays on a desk until pushed. This demonstrates the book's resistance to this.
What is a change in motion?
According to Newton's Second Law, this happens to acceleration when mass increases but force stays the same.
What is it decreases?
A rocket moves upward because of gases pushing downward. This demonstrates this law.
What is Newton's Third Law?
This type of friction occurs when an object is not moving.
What is static friction?
When a car turns a corner, the passengers feel like they are being pushed to the side due to this kind of motion.
What is circular motion/inertia?
This force often opposes motion and causes objects to eventually stop.
What is friction?
A 10 kg object accelerating at 2 m/s2 has this amount of net force.
What is 20 newtons?
When you jump, the ground pushes you up with the same amount of this that you push down.
What is force?
The upward force that a surface exerts on an object resting on it is called this.
What is the normal force?
The rate of change of velocity per unit of time is calculated with this formula.
What is acceleration = (final velocity - initial velocity) / time?
In space, an astronaut can float indefinitely in one direction because of this principle.
What is inertia, or Newton's First Law?
This is the acceleration of a 5 kg object acted on by a 25 N force.
A swimmer moves forward by pushing water backward. This is an example of this kind of force pair.
What is an action-reaction pair?
Air resistance is a type of force that acts opposite to motion.
What is drag?