Force
This is a push or a pull.
What is a force?
This law states that every action has an equal and opposite reaction.
What is Newton's third law?
This is the rubbing force that acts against motion between two touching surfaces.
What is friction?
Where the forces acting on an object are unbalanced, the net force is not this number/quantity.
What is zero?
The time for an action-reaction situation is this.
What is instantaneous/instantly/immediately?
This word describes the total force felt by and object.
What is net?
This law can be expressed with the equation a=F/m, or acceleration is equal to net force over mass.
What is Newton's second law?
This type of friction enables one to ride a bike without skidding and falling.
What is rolling friction?
This force keeps bridges from breaking when people walk across them.
What is normal force?
The force of _________ exists between any two objects that have mass.
What is gravity?
When forces cancel each other out, they are said to be this.
What is balanced/what are balanced forces?
This law states that an object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an outside force.
What is Newton's first law?
Applying the brakes to a moving vehicle uses this type of friction.
What is sliding friction?
The wall pushes back.
Even without gravity, this force slows all objects to a stop when there is contact.
What is friction?
In order to know how a force will affect an object, this quality must be known.
What is direction?
According to Newton's first law, an object in motion moving at a constant speed will continue moving in this type of line unless a net force acts upon it.
What is a straight line?
This type of friction impacts objects in the air (do not use "friction" in the answer).
What is air resistance?
This term describes the speed an object reaches when the force of gravity is balanced by the force of air resistance.
What is terminal velocity?
If a net force acts at an angle to the direction an object is moving, the line the object is moving will be___________.
What is curved?
Give the formula for force.
Force equals mass times acceleration.
F=m(a)
Force is measured in this unit.
What are Newtons?
If a projectile is launched, what other force besides friction will eventually bring it down.
What is gravity?
This quantity is the gravitational force of any object near Earth's surface. (hint: this quantity is acceleration due to gravity, you must give the correct number and unit).
What is 9.8 meters per second squared?
An object at in motion will constantly move in a ______ _______ unless a net force acts upon it.
What is a straight line?