Vocabulary
Forces
Speed
Newton's Laws
Balanced/Unbalanced
100
Earth's pull on objects at its surface
Gravity
100
T/F Mass is the measure of the amount of gravitational attraction between objects.
False
100
T/F to calculate average speed you take your total distance and divide it by your total time?
True
100
T/F Newton's 2nd law is also called the seatbelt law and the law of inertia.
False
100
T/F A child sitting on a swing is an example of balanced forces.
True
200
Metric unit for force and weight
Newton
200
If I went to a planet with a greater gravitational pull what would change about me?
My weight
200
What is the formula for determining speed?
S = d/t
200
What is Newton's 2nd law?
F = m x a Force = mass x acceleration
200
What kind of forces are acting on a book sitting on the corner of a desk?
balanced
300
Measure of how far something moves during a period of time.
Speed
300
Name something that would cause one planet to have a greater gravitational pull then another planet.
More mass
300
What would I need to measure in order to determine a runners speed?
The distance they ran and their time.
300
What makes moving objects tend to stay in motion and what makes moving objects stop?
Inertia and forces (pushes or pulls)
300
Name two times when objects have balanced forces.
when they have constant velocity or they are at rest
400
Force that opposes motion whenever two surfaces rub together.
Friction
400
What force acts on a bike rider and makes there speed greater going down a hill rather than when they are climbing the hill.
gravity
400
If I travel 250 miles in 6 hours and 200 miles in 3 hours what was my average speed.
50 mph
400
Why are car accidents more serious than two people bumping into each other in the hallway?
According to Newton's second law F=M x A so cars have more mass and have a greater acceleration than two people walking down a hall, therefore, the force when they collide would be much greater.
400
What are three situations when an object has unbalanced forces.
When it is speeding up, slowing down, or changing directions
500
What is the definition for velocity?
Speed of an object in a particular direction
500
What is inertia?
The resistance of an object to change what it is doing.
500
How far would I go if I travel at 60mph for 8 hours.
480 miles
500
According to the third law, for every action force there is an _________ and ___________ reaction force. Describe what that means for someone walking across the room.
equal and opposite They push against the ground and at the same time the ground pushes back on them with an equal amount of force.
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