When the net force on an object equals 0N, we describe the forces as this.
What is balanced forces?
100
Why does a crumpled piece of paper land before a flat sheet of paper?
What is more air resistance on the flat paper?
100
Force = mass x acceleration
The more mass an object has, the more force is required to accelerate it
What is Newton's second law?
200
The unit of measurement for a force
What is Newtons (N)?
200
A pushing or squeezing force
What is compression?
200
A car is traveling north, therefore friction is acting to the ______
What is to the left?
200
In what directions does gravity accelerate a projectile?
What is vertically downward
(The forward force gives the horizontal motion)
(Examples: a pitched baseball, a leaping frog, an arrow being shot, NON EXAMPLE: a crate sliding on the ground)
200
An object at rest will remain at rest, and an object in motion will remain in motion, unless acted on by an outside force
What is Newton's 1st law
300
The combination of all forces acting on an object
What is net force?
300
A force opposing motion when 2 surfaces are touching
What is friction?
300
As soon as an object starts moving, static friction is replaced by this type of friction.
What is kinetic friction?
300
An object is dropped from a height of 10,000 meters. As the object falls, the velocity of the object will ______________.
What is accelerate until the forces on the object are balanced, and then continue at a constant rate?
300
For every action there is an equal and opposite reaction. Therefore all forces act in pairs.
What is Newton's 3rd law?
400
A force of attraction between objects due to their masses
What is gravity?
400
A force caused by gravity pulling down on mass
What is weight?
400
All forces have these two properties.
What is direction and magnitude?
400
The Law of Universal Gravitation states that gravitational force is related to these 2 factors.
What is mass and distance of the objects?
(More mass = more gravity)
(Closer objects = more gravity)
400
Without the act of an outside source, a moving object will...
What is move with constant velocity?
500
The tendency of an object to resist changes in motion
What is inertia?
500
The maximum speed an object will fall when air resistance is equal to gravity
What is terminal velocity?
500
People have stated that balanced forces are only at work when an object is not moving", this is incorrect because...
What is when forces are balanced an object can also be moving at constant velocity?
500
When an object is moved from the Earth (more mass) to the moon (less mass), weight __________ , and mass _________. (increases, decreases, stays the same)
What is weight decreases, and mass stays the same?
500
A force of 25 N is exerted sideways on two tables, one is 10kg the other is 20kg. Which table will have the greater acceleration?
What is the 10kg table?
Due to inertia because F = ma