to find the opposite side of a right triangle which trig function would you use?
sine
100
A quantity that has magnitude but no direction is called a
Scalar
100
In the absence of air resistance, the horizontal motion is _____
constant
100
What is the vertical velocity at the peak of flight
zero
100
Velocity of a given object can appear differently to different people due to different _________________
frames of reference
200
Pythagorean theorem and SOHCAHTOA can be used for any triangle
True or False
False, it can be used for right triangles only
200
The sum of two or more vectors is called a ___
resultant
200
A rock is thrown horizontally and dropped from the same height at the same time. Which hits the ground first? (ignore air resistance)
hit at the same time
200
A cannon is shot at 40 m/s at an angle of 30 degrees above the horizontal. How is the horizontal velocity calculated
40m/s x sin30 = 20m/s
200
A plane is traveling north and experiences a wind blowing to the east. What direction must the plane fly in order to stay on a straight path?
North West
300
A ball is thrown straight up, is the acceleration constant the entire time of flight?
Yes the acceleration is 9.8 m/s/s directed downwards
300
Name two quantities that are vectors
displacement, velocity, acceleration
300
The path of a projectile through space has a __________ shape
parabolic
300
At what angle will a projectile travel the furthest if shot from the ground
45 degrees
300
If a tree falls in the middle of the forest and no one is around to see it, what is its velocity just before it falls
0
400
A boy is walking to the bus stop at velocity v, and realizes he forgot his physics homework. He runs back to the house at twice his original speed. What is the expression that would express this new velocity
-2v
400
a given angle is located below the negative horizontal axis. What direction would be associated with this angle?
South of West
400
horizontal displacement of a projectile is called its ____
Range
400
At what point during the flight is the velocity the smallest?
peak
400
A passenger at the rear of a train moving at 15m/s relative to the ground, throws a ball at a speed of 15 m/s in a direction opposite the train. What is the velocity of the ball relative to the ground?
0 m/s
500
50 m/s * sin 30 =
25 m/s
500
How should displacement and velocity vectors be drawn?
Tip to Tail
500
If the height a rock is thrown from doubles the time it takes to hit the ground will increase by what factor?
square root 2
500
An object is shot from ground level at 20 m/s at an angle of 56 degrees above the ground. What velocity does it hit at?
20 m/s at 56 degrees below the ground
500
Why does an airplane landing on an aircraft carrier approach from the back of the ship instead of head on?
Plane's velocity is slower relative to the ship allowing more time to stop.