Worksheetsfree-fall, projectiles, and vectors check
Total questions: 21
Worksheet time: 32mins
about 9.8 m/s^2
Free fall is any motion of a body where ____ is the only force acting upon it.
body attraction
tension
gravity
velocity
If an object is in free fall for three seconds, how fast will it be falling at the end of its motion?
vf= gt
9.8 m/s
19.6 m/s
29.4 m/s
39.2 m/s
You drop your cell phone while in the bathroom in front of the mirror while the water is running in the sink below. If you are 0.45 meters above the sink, how long do you have before your cell phone is a gonner.
t=g2d
0.09 s
0.03 s
0.3 s
0.9 s
A vector quantity has ______________.
Magnitude only
Magnitude and Direction
Direction only
Direction and angles
A boat is traveling at 50 m/s in a river flowing at 15 m/s in the exact same direction. What is the resultant velocity of the boat?
65 m/s
35 m/s
52 m/s
It cannot be determined
A hiker walks 40 m due North then turns due South and walks 60 m. What is the resultant displacement?
100 m North
100 m South
20 m North
20 m South
Click all the measurements needed to determine the range of a horizontal projectile.
height
horizontal velocity
mass of the projectile
A player kicks a ball across the field. At the very top, what is the acceleration of the ball?
It is accelerating to the right
There is no acceleration at the top
9.8 m/s2 up
9.8 m/s2 down
A soccer ball is kicked horizontally off a cliff. What information is needed to find the time to fall?
The height of the cliff
The initial speed of the ball
The mass of the ball
All of these
How comfortable are you solving horizontal projectile problems?
Very comfortable
I'm pretty sure I've got it
I feel okay but not great
I'm so confused please help (ask for help if this is you!)
Which best describes the horizontal motion of a projectile, assuming no air resistance?
Acceleration of -9.8 m/s2
Acceleration of -5 m/s2
An increasing acceleration every second
Constant velocity
What is the first step in solving a projectile problem?
Two columns - x and y
sketch it
variable lists
calculate time
A cannon is fired horizontally from a 5.0 m tall tower. How much time will it take until the projectile hits the ground?
0.5 s
1.0 s
2.0 s
5.0 s
If the cannonball from the previous question is fired with a horizontal velocity of 140 m/s, how far will it travel horizontally?
141.4 m
282.8 m
176.3 m
83.8 m
The final requirement for a degree in geology is Field Camp, an 8 week field experience in which budding geologists must complete rigorous real-world mapping projects. To celebrate the end of field camp, one student threw his rock hammer off of a 78 m cliff with a horizontal velocity of 34 m/s. He was then reminded that he had one more day of field work, so he needed to go get his hammer. How far away from the cliff did he have to walk in order to find his hammer?
Solve for time first t= sqrt(2d/g)
then Horizontal Distance d=vt
221.78 m
153.23 m
135.65 m
78.98 m
