Inertia & Motion
This law is often summarized by saying objects at rest stay at rest unless acted upon by an outside force.
What is Newtons first law
This is the famous mathematical formula used to determine force based on mass and acceleration.
What is f=ma
This is the "key phrase" used to describe the Third Law regarding actions and reactions
What is For every action is an equal, but opposite reaction
This type of force, such as gravity or magnetism, can be applied without objects physically touching.
What is a noncontact force
This is defined specifically as the gravitational force exerted on an object.
What is weight
This is the resulting "net force" when 10 N pushes right and 3 N pulls left.
What is 7 N to the right
If a foot has a mass of 2 kg and is using 10 N of force, this is the resulting acceleration.
What is 5 m/s^2
A force pair consists of the forces that this many objects apply to each other.
What is 2
These are the two primary factors that determine the strength of the gravitational force between two objects.
What is mass and distance
This is a force that has an upward push from a hard surface.
What is a normal force
This force causes an object with a constant velocity to have acceleration.
What is an unbalanced force
This is the standard unit of measurement for both force and weight.
What is newtons
Unlike balanced forces, force pairs do not cancel out because they act on these
What is different objects
Gravity is exerted through this—a region of space where every point has a physical quantity like force.
This is the approximate weight of a 10 kg bowling ball on Earth.
What is 98 N
These types of forces act on the same object and result in a net force of zero, meaning the object's motion does not change.
What is balanced forces
Close to Earth's surface, all objects fall with this specific acceleration regardless of mass, assuming no air resistance.
What is 9.8 m/s^2
In a drone, the blades push air down; according to the Third Law, the air does this.
What is pushes the drone up
This specific noncontact force is created when a charged balloon makes a person's hair move from a distance.
What is an electric force
This is based on the gravitational pull exerted on Earth.
What is weight
Because of inertia, a moving ball hitting a stationary ball causes the hitting ball's velocity to do this.
What is velocity decreases
Near Earth's surface, an object's weight is roughly this many times its mass in kilograms.
What is nearly 10 times
When you push against a wall, the wall pushes back on you with this much force.
What is an equal force
Every force, including noncontact ones, must have one of these responsible for the interaction.
What is a source object
While mass stays the same, an object's attraction to Earth decreases as this increases.
What is distance