Defintion
Defintion
Defintion
Question
NJ ask Practice
100
What is acceleration
A change in an objects speed or direction.
100
What is force?
A push or a pull to move an object.
100
What is normal force?
A force that pushes up to support the weight of an object.
100
Is her acceleration positive or negative?
Object in motion it states in motion acted on by another force.
100
Ex of contact force
friction
200
What is net force?
Amount by which the opposing forces acting on an object are unequal.
200
What is Newtons First Law of Motion?
A force acting on an object so that all forces are balanced and continue what they are doing.
200
What is inertia?
The tendency of objects to keep doing what they're doing.
200
What is the value of her acceleration during this time?
Friction from the bat and gravity slows the baseball down.
300
What is Newton's third law of motion?
For every action, there is an equal and opposite reaction.
300
What is non contact?
A force that acts on an object to change the speed and direction.
300
Gabe kicked a soccer ball across a field. The ball rolled for a while but eventually stopped. If Newton's first law is true, it seems that the ball Gabe kicked should continue rolling forever. Why does the ball stop?
Newton's first law of motion states that objects will keep doing what its doing if forces acting on it are balanced.
300
Forces that are, examples:
Stars, asteroids, planets
400
What is a contact force?
A force that must touch an object to change its speed and/or direction.
400
What is gravity?
A force that acts without physical contact to put to objects towards each other.
400
Suppose you're playing baseball and hit a home run. What forces slow down the ball while its in motion?
Law of inertia is an objects resistance to change in motion.
400
What force slows a car down
Scientists describe motion by acceleration
500
What is a newton?
The unit used to measure force or weight.
500
What is Newton's Second Law of Motion?
The acceleration of an object is related to the net force acting on it in the mass of an object.
500
If you hit the home run in space, what would happen?
Friction from the ground stops a soccer ball when you kick it.
500
What force causes a ball to speed up as it rolls down hill?
Scientists express acceleration with the units m/s for each second or m/s2
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