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Definition
Definition
Definition and Notes
Notes
Notes
100
If the forces acting on an object are balanced, the object will continue doing what it is doing
What is Newton's First Law of Motion
100
A force that occurs when two things move past each other and rub together
What is friction
100
The amount by which the opposing forces acting on an object are unequal
What is net force
100
Now suppose Sharon rides her bike down the street in 20 seconds. During this time, her speed decreases to 5 m/s. What is the value of her acceleration during this time?
What is the value of her acceleration is 100 meters in 20 seconds.
100
What force causes a ball to speed up as it rolls down a hill?
What is Gravity causes a ball to speed up as it rolls down a hill
200
The tendency of objects to keep doing what they are doing (moving or staying at rest)
What is inertia
200
The force that pushes up to support the weight of an object
What is normal force
200
For every action, there is an equal and opposite reaction
What is Newton's Third Law of Motion
200
goes faster
What is a ball rolling down a hill
200
Sharon cruises east at 7 m/s. She then uses her brakes and comes to gentle stop. As Sharon slows, how does the direction of the net force compare to that of her motion?
What is The net force becomes greater as the motion decreases
300
A change in an objects speed or directions
What is acceleration
300
A force that acts without physical contact to pull two objects toward each other
What is gravity
300
Suppose you are playing baseball and hit a home run. What forces slow down the ball while in motion.
What is the air resistance slows the ball down
300
goes slower
What is a home run
300
What is the slope of the line between 4 s and 6 s? What does this say about the object's speed?
What is The slope is 0; The objects speed is not changing
400
A push or pull that causes something to change its motion
What is force
400
The acceleration of an object is related to the net force acting on it ans the mass of an object
What is Newton's Second Law of Motion
400
If you hit the home run in space, what would happen
What is the ball would keep going
400
changes direction
What is a Frisbee in the air
400
Identify all of the time intervals when the object is speeding up, slowing down, or keeping a constant speed.
What is The object is speeding up between 0 to 20 seconds then keeps a constant speed 20s to 40s. Speeds up between 40s to 50s then stays the same between 50s and 60s. The speed slows down between 60s and 80s.
500
A force that must touch an object to change its speed and/or direction
What is contact force
500
The metric unit used to measure the force or weight
What is newton
500
Suppose that Sharon rides her bike at a speed of 10 m/s. As she rides up a hill, her speed decreases to 5 m/s. Is her acceleration positive or negative
What is Sharon s acceleration is negative
500
Dave is driving down the street. If Dave steps on the brakes, what force slows the car down.
What is contact force slows the car down.
500
Identify the speed of the objects between 20 and 40 s.
What is speeding up