What happens when two forces act in the same direction?
What is the two forces are added together
100
The force that one surface exerts on another when the two rub together
What is friction
100
Objects that fall through the air experience a type of friction called___________
What is air resistance
100
when something decelerates what is happening?
What is an object is slowing down
200
The achievement of a rocket lifting off the ground can be explained by __________________
What is Newton's third law of motion
200
What are the two factors that affect all objects on Earth
What is friction and gravity
200
The force of gravity on a person or object on the surface of Earth is called
What is weight
200
Define Inertia
What is the tendency of an object to resist a change in motion
200
Please state the formula for momentum and the unit that it is measured in
What is momentum = mass x velocity, it is measured kg x m/s
300
explain what it means when the object is in free fall
What is the only force that is acting on an object is gravity, the object is said to be in free fall
300
What is a force
What is a push or a pull
300
what is the difference between mass and weight
What is mass is the amount of matter inside an object. weight is the force of gravity on an object.
300
According to Newton's second law of motion what are the two ways to increase acceleration of an object
What is 1) increase the force being applied 2)reduce the mass of the object
300
Please state Newton's third law of motion
What is if one object exerts a force on another object, than the second object exerts a force of equal strength in the opposite direction
400
explain the motion of an object that has two forces pushing on the object creating a balance force
What is the object does not move. Only when there is an unbalance force do objects move.
400
what is the unit of force
What is a Newton
400
what are the four types of friction?
What is 1)static friction 2)sliding friction 3)rolling friction 4)fluid friction
400
Define Newton's 1st Law of motion
What is an object at rest will remain at rest, and an object moving at a constant velocity will continue moving at a constant velocity, unless it is acted upon by an unbalanced force
400
Please explain how mass affects acceleration
the more mass an object has the slower the acceleration
500
what are the three ways in which acceleration can change
What is increasing speed, decreasing speed, and changing direction
500
what is the formula for acceleration
What is final speed - initial speed divided by time
500
Explain the law of universal gravitation
What is every object in the universe is attracted to one another without exception
500
Please state the third law of motion and formula to the second law of motion
What is acceleration depends on the object's mass and on the net force acting on an object. F= M x A
500
Explain the law of conservation of momentum
What is in the absence of outside forces, the total momentum of objects that interact does not change.