2.
a. To convert the speed from miles per hour (mi/h) to kilometers per hour (km/h), we
need to convert miles to kilometers. This conversion is achieved by using the
relation 1.609 km = 1 mi
b. To convert the speed from miles per hour (mi/h) to meters per

1.
The distance traveled by the Space Shuttle is equal to its speed multiplied by the
time. The number of football fields is equal to this distance divided by the length L
of one football field.
The number of football fields is
(
)(
)
7.6 103 m / s 110 10

3. According to Equation 3.2, we have
a
v v0
t t0
or
340 m / s 2
v 0 m/s
0.050 s
or
c
v 340 m / s 2
0.050
b
h sg
Using trigonometry, we find the components to be
0.050
b cos
c
h sg 51 11 m / s
v sin 51 c m / s h
340
0.050 sin
b sg 51 13 m / s
v x v cos 5

1.
According to Newtons second law, the acceleration is a = SF/m. Since the pilot and the
plane have the same acceleration, we can write
S
S
F
F
=
m
PILOT m
PLANE
SF
m
PLANE
( SF ) PILOT =mPILOT
or
Therefore, we find
104 N
3.7
=
93 N
4
3.1
1

Physics Midterm Study Guide 2014
Unit 1 Basics
Base units in Mechanics are meters, kilograms, and seconds (Kelvins, moles amperes and candelas are base units too)
Derived units combinations of base units, for example, m/s
Metric prefixes tera, giga, mega,