Motion and Speed
A change in position
Motion
The rate of change in velocity
Acceleration
A push or a pull
Force
The force of attraction between any two objects that have mass
Gravity
Name one form of friction
Air resistance
Ground
Other objects
The length of a path between two points
Distance
How do you calculate change in speed
Ending speed - Beginning speed
A force that opposes motion and that occurs when things slide or roll over each other
Friction
Gravity causes objects to ___________ as they fall
Speed up/Accelerate
When a marble is rolled along a floor, what force(s) cause it to slow down and stop?
Friction
What is the formula for calculating Distance
The rate of slowdown
Deceleration
Newton's First Law: If no force acts on an object at rest, it will stay ________.
At rest
What can cause objects to fall at different speeds? Think of a piece of paper
Air Resistance
If an object is not moving, what must happen for it to begin moving?
A force must act on the object
The rate at which the position of an object changes
Speed
Aidan is traveling down the road at 36 mph when he notices an armadillo crossing the road and slows down to 15 mph to let the little guy cross the road. What was the change in speed?
15-36 = -21mph
Newton's 2nd Law: The larger the _____ of an object, the more force is needed to give it a certain acceleration.
Mass
The amount of air resistance acting on a moving object depends on the ______ of the object
Shape
The speed and direction in which an object is moving
Velocity
Distance / Time
Cale and Alex are walking home after school at a rate of 5mph. Out of nowhere, a llama on the loose chases them and they pick up their speed to 15 mph in just 5 seconds. Calculate the Acceleration.
Change of Speed = 15-5 = 10mph
10mph/5 sec = 2mph per sec.
Newton's 3rd Law: For every action, there is an equal and _________ reaction
Opposite
The Law of universal gravitation states that gravitational force depends on the ______ of two objects, and the __________ between them.
Mass; Distance
A train's average speed is 120 km per hour. Its elapsed time is 2 hours. How far did it travel? (Hint D=rt)
240 km