9/1/16 AP Physics Exam Review
÷ 45n@ t.FI#=o.thr45ph -30M¥ omiletjp v=d=-⇒ Drop
A car travels 30 miles at an average speed of 60 miles per hour and then 30 miles at an average speed of 30 miles per hour. The average speed the car over the 60 miles is
30
Gonph
mph
miles
60M¥ 1.5
=
÷
=
1.04
his
=
4$mph
v
A truck traveled 400 meters north in 80 seconds, and then it traveled 300 meters east in 70 seconds. The magnitude of the average velocity e of the truck was most nearly
of
=
=
off •
3.33€ Folly =
,
:÷:÷÷ {
oft
=
500
m
02
A rock is dropped from the top of a 45-meter tower, and at the same time a ball is thrown from the top of the tower in a horizontal direction. Air resistance is negligible. The ball and the rock hit the level ground a distance of 30 meters apart. The horizontal velocity of the ball thrown was most nearly
.in = : iii 0=Vi2+2aG
)
'
\
vj2=
2aG )
f.Xeon kVf=0 In ;
-
yhE@+2afD |vi=24r5@ *Xz=3@ :F¥¥¥÷⇒ 1
a5
\
1
,
Vi
box =P
-
Is
÷
-
*
A 500-kilogram sports car accelerates uniformly from rest, reaching a speed of 30 meters per second in 6 seconds. During the 6 seconds, the car has traveled a distance of
=
÷
te 2
3°z°÷ D=
-1576
D=
9Om
)
f=
30mL
:# Fox µ she
A model rocket accelerates from rest upwards at 50 m/s2 for 2.0 s before its engine burns out.The rocket then coasts upward.What is the maximum height that the rocket reaches? You may assume air resistance is negligible.
Vf
#
-_
at
y=EnkX2 vg=
"
)
100mV
vg
,
:÷÷¥±⇒Ext¥ 27004
t
[email protected]
p
,
¥006
-
glom
+
|
?
10.3
A model rocket is launched vertically with an engine that is ignited at time t = 0, as shown above.The engine provides an upward acceleration of 30 m/s2 for 2.0 s. Upon reaching its maximum height, the rocket deploys a parachute, and then descends vertically to the ground.
A. Determine the speed of the rocket after the 2 s firing of the engine.
B.What maximum height will the rocket reach?
C.At what time after t = 0 will the maximum height be reached?
fit
:I¥s¥iFH¥e±
¥*y÷FF÷# vih
: 5
=
-2
a
G)
