Motion
The change in an object's speed or direction
What is ACCELERATION?
Forces that cancel each other out
What are BALANCED FORCES?
Using a lubricant, making a surface rougher, making a surface smoother, using less pressure
Which does NOT reduce friction?
What is MAKING A SURFACE ROUGHER?
The Law of Universal Gravitation states that gravity is related to these 2 things.
What are MASS AND DISTANCE?
Trees, mountains, and mailboxes would all be good examples of these
What are REFERENCE POINTS?
An object that appears to stay in place and helps to detect motion of another object
What is a REFERENCE POINT?
This type of force produces a change in motion
What is an UNBALANCED FORCE?
The part of your car that is used to create friction to stop the car
What are the BRAKES?
Gravitational pull is greater between two objects that have greater (distance/masses).
What are MASSES?
While on a road trip, our car traveled 360 mi west for 6 hours. Find the velocity.
What is S = d/t
S = 360 mi/6h
V = 60 MI/H WEST
Velocity includes both speed and _______
What is DIRECTION?
A pencil lying on a desk is an example of this type of force
What is a BALANCED FORCE?
The force that opposes motion between 2 surfaces that are in contact
What is FRICTION?
The measure of the amount of matter
What is MASS?
Student A is pushing a box to the right with 70 N. Student B is pushing the same box to the right with 75 N.
What is the net force?
What is 70 N + 75 N = 145 N
A dog walked 1.9 m/s uphill and changed to 1.3 m/s uphill. Since the speed decreased, the dog had
What is NEGATIVE ACCELERATION?
While playing Tug O War, Team A is pulling to the left with 50 N and Team B is pulling to the right with 65 N. The net force is ________.
What is 15 N TO THE RIGHT?
Engine parts wearing down is an example of this
What is HARMFUL FRICTION?
The moon's gravity is 1/6 the amount of gravity on Earth. A man that weighs 240 lbs. on Earth would weigh this much on the moon.
What is 40 LBS?
After calculating the net force, a students find that the force is 0 Newtons, so it is this type of force
What is a BALANCED FORCE?
A bicycle making a turn and increasing its speed from 5 m/s to 8 m/s is an example of ______.
What is ACCELERATION?
This operation is used to calculate net force when the forces are working together in the same direction.
What is ADDITION?
Sand is put down on icy roads to (reduce/increase) friction.
What is INCREASE FRICTION?
If the mass of an object was 48 kg on the moon, it would have a mass of this amount on Earth
What is 48 KG?
Three ways to accelerate
SPEED UP, SLOW DOWN, CHANGE DIRECTION