PAP Physics Test Review-Kinematics, Projectiles, and Relative Motion

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14 Νοε 2013 (πριν από 3 χρόνια και 5 μήνες)

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Name: ____________________________________________________

Period: __________

Date: ____________________


HOFFMAN


PAP Physics Test Review
-
Kinematics, Projectiles, and Relative Motion

YOU MUST SHOW YOUR WORK! USE GUMPAC ON THE CALCULATIONS!


1.


How do objects land when a bullet is shot and a baseball is dropped from the same height and at the same
time? Explain why this occurs.


2.

Explain how objects move when given a horizontal velocity, and when an object is in free fall, and when an
object is
given a horizontal velocity and then allowed to move under free fall.

3.


The fastest recorded pitch in Major League Baseball was thrown by Nolan Ryan in 1974. If this pitch

were thrown horizontally, the ball would fall 0.809 m (2.65 ft) by the time it reache
d home plate, 18.3 m (60
ft) away. How fast was Ryan’s pitch?


4.
A shell is fired from the ground with an initial speed of 1.70
×
10
3

m/s (approximately five times the speed of
sound) at an initial angle of 55.0
°
to the horizontal. Neglecting air resistance, find

a.
the shell’s horizontal range

b.
the amount of time the shell is in motion


5.

Explain what
would be the ideal angle for a projectile
to be launched and have the most horizontal
displacement.


6. Explain

what the angle would be
for a projectile to be launched and have the least amount of horizontal
displacement.


7.
a)
Explain the statement, “All motion is relative.”

b)
What is a frame of reference?


9.
When we describe motion, what is a common frame of
reference?


10.
A small airplane is flying at 50 m/s toward the east. A wind of 20 m/s toward the east suddenly begins to
blow, giving the plane a velocity of 70 m/s east.

a.
Which
of these are component vectors?
b.
Which is the resultant?
c.
What is the

magnitude of the wind
velocity?


11.
A ball is thrown upward in the air by a passenger on a train that is moving with constant velocity.

a.
Describe the path of the ball as seen by the passenger. Describe the path as seen by a stationary
observer
outside
the train.
b.
How would these observations change
?


12. An escalator is 20.0 m long. If a person stands on the escalator, it takes 50.0 s to ride from the bottom to the
top.

a.
If a person walks up the moving escalator with a speed of 0.500 m/s relative
to the escalator, how long does it
take the person to get
to the top?

b.
If a person walks down the “up” escalator with the same relative speed
as in item (a), how long does it take to reach the bottom?


13. A dog searching for a bone walks 3.50 m south,
then 8.20 m at an angle of 30.0
°
north of east, and finally
15.0 m west. F
ind the dog’s resultant displacement vector.


14. A person walks 25.0
°
north of east for 3.10 km. How far would another person walk due north and due east
to arrive at the same
location?

Name: ____________________________________________________

Period: __________

Date: ____________________


HOFFMAN


15
. A quarterback takes the ball from the line of scrimmage, runs backward for 10.0 yards, then runs sideways
parallel to the line of scrimmage for 15.0 yards. At this point, he throws a 50.0
-
yard forward pass straight down
the field. What is t
he magnitude of the football’s resultant displacement?


16
.
A boy sledding down a hill accelerates at 1.40 m/s2. If he started from rest, in what distance would he reach
a speed of 7.00 m/s?


17
. A snowmobile has an initial velocity of
+
3.0 m/s.

a.
If it

accelerates at the rate of
+
0.50 m/s
2

for 7.0 s, what is the final velocity?

b.
If it accelerates at the rate of
-
0.60 m/
s2
, how long will it take to reach a complete stop?


18
.
A bus

accelerates un
iformly after picking passengers up from a bus stop,

to a speed of 65 km/h in

12 s. Find
the distance the bus
travels during this time.


19
. Draw the pathway of a football that has been kicked and lands on the field without being caught. Label
where the ball has zero velocity (2 places), where velocity is

maximum, where velocity is decreasing, and where
velocity is increasing.


20
. Compare how objects fall when there is no air resistance and when there is air resistance.


21
. Compare how objects with air resistance fall on earth compared to how they fall

on the moon.


2
2
. An elevator is moving upward 1.20 m/s when it experiences an acceleration of 0.31 m/s
2

downward, over

a distance of 0.75 m. What will its final velocity be?


23
. A peregrine falcon dives at a pigeon. The falcon starts downward from res
t with free
-
fall acceleration. If the
pigeon is 0.0760 km below the initial position of the falcon, how long does the falcon take to reach the pigeon?
Assume that the pigeon remains at rest.


24
. A juggler throws a bowling pin into the air with an initial

velocity
v
i.
Another juggler drops a pin at the
same instant. Compare the accelerations of the two pins while they are in the air.


25
. A person walks 25.0
°
north of east for 3.10 km. How far would another person walk due north and due east
to arrive a
t the same location?


26
. The fastest recorded pitch in Major League Baseball was thrown by Nolan Ryan in 1974. If this pitch were
thrown horizontally, the ball would fall 0.809 m (2.65 ft) by the time it reached home plate, 18.3 m (60 ft)
away. How fast
was Ryan’s pitch?


27
.
During a rodeo, a clown runs 8.0 m north, turns 55
°
east of north, and runs 3.5 m. Then, after waiting for
the bull to come near, the clown turns due east and runs 5.3 m to exit the arena. What is the clown’s total
displacement?


28
. A plane travels 2.7 km at an angle of 15
°
to the ground, then changes direction and travels 5.1 km at an
angle of 25
°
to the ground. What is the magnitude and direction of the plane’s total displacement?


30
.
A person standing at the edge of a seaside
cliff kicks a stone over the edge with a speed of 18 m/s. The cliff
is 52 m above the water’s surface
.

How long does it take for the stone to fall to the water? With what speed
does it strike the water?