Chapt. 4
Two and ThreeDimensional Kinematics
43
x
direction.
b) Solve for
v
x
0
and
v
y
0
as functions of
ONLY
x
,
y
,
t
and
g
.
c) Solve for the launch speed
v
0
and launch angle
θ
from the horizontal as functions of
ONLY
x
,
y
,
t
, and
g
. Note
ONLY
x
,
y
,
t
, and
g
.
d) The ball landed 125 m in horizontal distance from the launch pad (i.e., homeplate) and
25 m above the launch height. The flight time was 3
.
98 s. What was the launch speed and
angle?
004 qfull 00240 3 3 0 tough math: orient express
6. You are on the last run of the historic Orient Express train in 1939 traveling from Paris to
Istanbul.
Somewhere between Belgrade and Sofia, the train ominously starts accelerating in
the reverse direction—which we will call the negative
x
direction. The
MAGNITUDE
of this
acceleration is
a
tr
. The train is on a
STRAIGHT
, level line of track. Neglect
AIR DRAG
.
a) Inside the train car a projectile is launched in the positive
x
direction (i.e., in the forward
direction).
What is the horizontal acceleration
RELATIVE
to the train car in terms
of knowns?
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 Fall '06
 Buchler
 Physics, Acceleration, Velocity, Folkestone, horizontal range, launch speed

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