Textbook Vocabulary
Define net force the way it is stated in the text.
The net force on an object is the combination of all the forces on the object.
When you change your __________, you experience motion.
position
An arrow representing a greater force would be (longer/shorter) than an arrow representing a lesser force.
longer
Whenever a force is exerted both an _________ force and a _________ force are present.
action, reaction
What is the net force if there is 2 N acting upwards, and there is 5 N acting downwards?
-3 N (3 N down)
Define average speed the way it is stated in the text.
The average speed of a moving object is the total distance traveled over the total time of travel.
Acceleration can be caused by a change in speed, a change in direction, or ______.
Both.
If forces are balanced, the motion of an object (changes/does not change).
According to the law of inertia, an object at rest will remain at rest unless it is acted upon by an __________ ______.
unbalanced force
What is the distance that Jake travelled if he jogged 5 m/s for 65 seconds?
325 meters
Define Newton's Laws of Motion.
They describe the relationship between forces, matter, and motion.
A distance-versus time graph is used to describe ________.
Speed
What is the formula for force and define what each variable means
F = ma; F = force, m = mass, and a = acceleration.
Acceleration depends on the _______ of an object and the _______ applied.
mass, force
If the driver of a car started at a stop sign and accelerated to a speed of 25 meters/second in 3 seconds going north, what is his acceleration?
8.33 meters/second^2
Define inertia the way it is stated in the text.
Inertia is the tendency of an object to resist a change in motion.
Velocity is a ________ quantity.
vector
If someone threw an object, what would be the force acting upon that object to counter the person's force.
Gravity
How does friction work?
It acts in a direction to oppose the motion between 2 objects (ex. ground and ball).
How much force is needed to accelerate a 1400 kg 2 m/s?
2800 N (Newtons)
Define velocity the way it is stated in the text.
The velocity of an object is its speed combined with the direction of motion.
What is instantaneous speed?
The speed of a moving object at a certain point of time.
What are the 4 forces that act on a plane
Thrust, Gravity, Air Resistance, and Lift
What was Issac Newton's anthology of books in which he used complicated geometry to describe the motion of objects.
Philosophiæ Naturalis Principia Mathematica (or accept Principia)
What is the speed of someone that travels 25 meters in 2 seconds?
12.5 m/s