1. In a straight line
2. in a curved path
3. back & forth as a vibration
4. as a rotation
100
List 8 words that describe direction
north, south, east, west, left, right, up , down
100
What is force?
any push or pull
200
What is a reference point?
A place or object used to determine if an object is moving
200
What is thrust?
a force that pushes or pulls an airplane forward
200
How can you tell if you are moving in a car?
by observing how fixed objects (signs or buildings) are coming and going
200
What 2 things must be measured to find an object's velocity?
speed and direction
200
What is friction? How does this affect moving objects?
Friction is a force that acts when two surfaces rub together
It slows or stops the moving objects
300
What is relative motion?
the change in one object's position compared to another object's position
300
What is lift?
a pushing force from below that keeps an airplane in the air
300
Mark kicks a soccer ball to Tracy. Describe how the soccer ball is moving relative to Mark and relative to Tracy.
The ball is moving away from Mark.
The ball is moving toward Tracy.
300
How do you find the average speed of an object?
Hint: use distance and time
Divide total distance by total time
Total Distance
___________
Total time
300
What is buoyancy?
a force where water will push up an immersed object
400
What is speed?
a measure of how fast an object moves
400
What is gravity?
The force that pulls all objects toward each other
400
Is a person sitting on a train moving relative to the train or relative to the ground?
Relative to the ground (the train is moving with the person)
400
List 4 different types of acceleration
starting, speeding up, slowing down, going around a curve (changing direction)
Any ONE of these is acceleration!
400
What happens to an object if two forces are pulling in opposite directions with the SAME amount of force?
forces are balanced and there is no movement
500
What is velocity?
a measure of how fast an object moves AND the direction it is moving
500
What is acceleration?
a change in the speed OR direction that an object moves
500
What happens when an object and the ground change relative position to each other?
The object is moving; the ground is not
500
Why does a roller coaster accelerate on a curved path even if its speed stays the same?
the DIRECTION changes as it moves around the curve
500
How do lift, thrust, drag, and gravity affect an airplane?
lift - the force that lifts a plane into the air
thrust - the force that moves a plane forward
gravity - the force that pulls the plane down
drag - the force that slows down the plane