Graphs
A ball dropped from rest falls for 10s. What does a displacement vs. time graph look like?
A exponential curve in the positive direction.
What is the letter for momentum?
P
What is one Newton equivalent to as a object?
An Apple!!!!
What is the description of a vector quantity?
Has both direction and magnitude.
In a circle the centripetal acceleration is in what direction?
The center of the circle.
A ball is thrown straight upwards until it come back to the starting point. What does an acceleration vs. time graph look like?
A horizontal line in the negative.
Work=(Force)(Distance)=?
Change in energy.
What is Newton's first law?
Object at rest/motion will remain doing so until acted upon by another force.
What is a description of a scalar quantity?
Only has magnitude.
In a circle, what is the direction of the velocity?
Perpendicular to the force/acceleration.
In a velocity vs. time graph what is the area under the curve equal to?
Acceleration.
If no unbalanced forces act upon a system momentum is....
conserved.
What is Newton's third law?
When object one exerts a force on object 2, object 2 exerts the same force on the object, but in the opposite direction.
Is energy scalar or vector?
It is scalar!
In uniform circular motion an object is in acceleration because....
it is changing direction constantly.
(Acceleration is change in speed and/OR direction)
In a force of the spring vs. change in spring length graph the slope is equal to what?
The spring constant.
WORK is only done in the direction of what?
Force and distance.
What is another name for Newtons first law?
The law of inertia (mass)
Is displacement scalar or vector?
Displacement is vector!
A centripetal force vs time graph looks like what?
An exponential graph in the positive direction.
In a gravitational force vs. mass graph the slope is equal to?
The gravitational field strength.
A 1kg mass is traveling at 10m/s. How much kinetic energy does it have?
KE=(0.5)(1)(10)2=50 Joules
Is Newtons second law linear or exponential?
Linear
EX: Fnet=ma (y=mx)
A vector!
Uniform circular motion occurs when?
An object travels in a circular path at a constant speed.