Physics 3204 – Sample Assignment #1 – Projectiles: Horizontal Launch – 2016-17
Name: ____________________________________________
1.
2.
While traveling upward at a steady speed of 5.0 m/s in a hot air balloon, a passenger leans out and drops a .100kg stone. The
stone was released when the balloon was precisely 30.0 m above the ground.
a)
Determine the time it takes the stone to hit the ground below. How fast would it be traveling at that time?
b)
What would be the vertical separation of the stone and the person’s hand when the stone reaches maximum height?
A favorite "out-harbor delight" of some boys in the 1950's was to twirl a rock at the end of a string and let go the string at just
the right time to allow the rock to streak vertically upward (exciting times! especially when the rock returned!!)
a)
If such a rock started upward with a speed of 22.0 m/s, how fast was it moving when it reached a height of 11.0 m?
b)
How long is required to reach this height?
c)
Why are there two answers to part b?
PHYSICS 3204 – SAMPLE ASSIGNMENT 1 – PROJECTILE MOTION
2016-17
PAGE 1 OF 4
3.
An airplane is moving at a constant velocity when you reach out and drop a
ball. Assuming that friction is negligible (the wind is blowing in exactly the
right direction and with the precise velocity needed) describe the ball’s path as
it falls to ground from your point of reference.
b)
4.
Describe, with a diagram, the path observed by a person standing on the ground and observing the drop.
Given the trajectory of the baseball thrown and a baseball
dropped, in the diagram to the right, use the vectors given to
create vector diagrams at the ball positions indicated.
b)
Briefly discuss the forces that act on the ball
horizontally and vertically that contribute to the observed
motion.
5.
Given a velocity of 4.0 m/s [E] and a second velocity vector of 6.0 m/s,
a)
find the maximum and minimum values for the final velocity and draw a vector representation for each situation.
PHYSICS 3204 – SAMPLE ASSIGNMENT 1 – PROJECTILE MOTION
2016-17
PAGE 2 OF 4
6.
b)
Draw four more possible final velocity vector diagrams.
c)
Using either trigonometric techniques or scale diagrams, find the final velocity for each of your
vector diagrams.
For a projectile thrown horizontally at 50 km/hr,
a)
calculate the velocity in the vertical direction at 1.0 s, 2.0 s, 3.0 s and 4.0 s.
b)
Find the final velocity for each of these times.
PHYSICS 3204 – SAMPLE ASSIGNMENT 1 – PROJECTILE MOTION
2016-17
PAGE 3 OF 4
7.
8.
In a movie scene, a car is moving at 26.0 m/s when it rolls off a cliff.
a)
If the car takes 5.5 s to reach the ground below, how high is the
cliff?
b)
How far from the bottom of the cliff would the car have landed?
c)
What was the impact velocity of the car?
A pitcher throws a baseball at 140 km/hr. If the plate is 28.3 m away, how far will the ball drop
by the time it reaches the plate if we assume that it was thrown horizontally?
PHYSICS 3204 – SAMPLE ASSIGNMENT 1 – PROJECTILE MOTION
2016-17
PAGE 4 OF 4