Kinematics
Free Fall
Projectile Motion
Forces
Work, Power, and Energy
100
What determines how fast you see an object moving?
point of reference
100
What is the formula for a free falling object?
d=1/2gt(squared
100
What is a projectile?
anything being launched to reach x
100
What is inertia?
a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.
100
When an object is at rest with the sum of all forces equaling zero, what is this called?
equalibrium
200
A Cessna Aircraft goes from 0 m/s to 60 m/s in 13 seconds. Calculate the aircraft’s acceleration.
a=delta(v)/delta(t) (0-60)/11=-5.45m/s/s
200
What is the formula for an object that was tossed upward?
d=v(initial)t+1/2gt(squared)
200
Half projectiles are ________ launched.
Horizontally
200
What is the force of a box that is 5kg with an acceleration of 2m/s/s?
f=mg f=(5)2 f=10N
200
What is acceleration?
increase or decrease in the rate or speed of something
300
When an object is moving at a constant speed, what would the x vs t graph look like?
It would go diagonally.
300
A ball takes 11 seconds to hit the ground after being dropped. What distance was it dropped from?
d=1/2gt(squared) d=1/2(-10)(11) d=55m
300
Whole projectiles are _______ launched.
Vertically
300
What is Newton's second law?
For every action, there is an equal and opposite reaction.
300
what unit is energy expressed in?
joules(j)
400
A boat moves slowly out of a marina (so as to not leave a wake) with a speed of 1.50 m/s. As soon as it passes the breakwater, leaving the marina, it throttles up and accelerates at 2.40 m/s/s. How fast is the boat moving after accelerating for 5 seconds?
v=v(initial)+at v=(1.50)+(2.40)(5) v=13.5m/s/s
400
What is the velocity at the peak of a full projectile?
0!!!
400
Projectiles move in ________ 2 components, horizontal and vertical.
2D
400
What is the other force in this situation? Baseball pushes the glove backwards
the glove pushes the ball forward
400
What is the equation for the work-energy theorem?
k=1/2mv(squared)
500
What are the 3 kinematics for horizontal motion?
V=v(initial)+at x=v(initial x)t+.5at(squared) v(squared)=v(initial squared)+2ax
500
A ball is thrown vertically upward from the surface of the Earth. Consider the following quantities: i. the speed of the ball ii. the velocity of the ball iii. the acceleration of the ball Which of these is zero when the ball reaches its maximum height?
i and ii
500
Horizontal formula:
X=Vox[t]
500
an object with a mass of 2kg is traveling with a velocity of 3m/s when a 5N net force acts on it. What will become the objects velocity if the force acts for 7 seconds.
v(final)=v(initial)+a(or f/m)*t v(final)=3m/s(5N/2kg)(7 seconds) v=20.5 m/s
500
The net work done on an object is (blank) th the change in kinetic energy of the object.
equal
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