42. The distance from the starting point in meters is
a.
0
b.
2
c.
4
d.
8
e.
16
43. The velocity acquired after starting from rest in m/s is
a.
0
b.
2
c.
4
d.
8
e.
16
44. The acceleration in m/s2 after starting from rest is
a.
0
b.
2
c.
4
d.
8
e.
16
45. A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is
a.
0
b.
0.2 m/s2
c.
4 m/s2
d.
8 m/s2
e.
16 m/s2
46. A racecar driver steps on the gas, changing his speed from 10 m/s to 30 m/s in 4 seconds.
The acceleration of the racecar is
a.
0
b.
2 m/s2
c.
4 m/s2
d.
5 m/s2
e.
7.5 m/s2
47. A racecar driver steps on the gas, and his racecar travels 20 meters in 2 seconds starting
from rest. The acceleration of the racecar is
a.
0
b.
5 m/s2
c.
9.8 m/s2
d.
10 m/s2
e.
20 m/s2
48. The maximum possible speed in nature is
a.
warp 10
c.
infinite
b.
the speed of light
d.
unknown
49. Freely falling bodies experience
a.
motion with constant velocity
b.
motion with zero acceleration
c.
motion with constant acceleration
d.
motion at a constant speed
e.
none of the above
MULTIPLE RESPONSE
1. Which of these are physical quantities?
a.
time
b.
energy
c.
seconds
d.
kilometers
e.
volume
2. Which of these are metric units?
a.
grams
b.
pounds
c.
seconds
d.
kilometers
e.
square miles
3. Which of these are units of measure?
a.
time
b.
energy
c.
seconds
d.
kilometers
e.
volume
4. Which of these are English units?
a.
seconds
c.
kilometers
b.
feet
d.
slugs
5. The notation s-1 means the same thing as
a.
1/s
c.
per second
b.
Hz
d.
none of the above
6. The object’s acceleration is zero in region(s)
a.
I
c.
III
b.
II
d.
no regions
7. Which of these are a part of the scientific method?
a.
hypothesis
c.
dogma
b.
experiment
d.
observation
8. What is “uniform motion?”
a.
smooth motion
b.
motion with zero acceleration
c.
motion with constant velocity
d.
motion at a constant speed
e.
motion along a straight path
9. Which of these objects is moving with constant velocity but changing acceleration?
a.
a rock dropped from a bridge
b.
a car going around a banked curve at 40 m/s
c.
an aircraft being launched off of an aircrft carrier
d.
an aircraft in a banked turn at 100 m/s
COMPLETION
1. A quantity that has only a magnitude but no direction associated with it is called a
__________.
2. A quantity that has both a magnitude and direction associated with it is called a
__________.
3. The proper abbreviation for ‘seconds’ is __________.
4. The notation s-1 means __________.
5. The proper abbreviation for ‘kilohertz’ is __________.
6. The number of cycles of a periodic process that occur per unit time is called the
__________.
7. The time for one complete cycle of a periodic process to take place is called the
__________.
8. In expressions like Dv and Dt, D stands for _________.
9. A body at the end of a spring oscillates up and down ten times in five seconds. The period of
oscillation is __________.
10. The slope of a velocity vs. time graph is the __________.
11. The slope of a distance vs. time graph is the __________.
12. An aircraft approaches a runway that runs directly east as a strong wind blows out of the
south. The direction that the aircraft should points in order to land on the runway is
__________.
13. As the ball is going upwards, the velocity points __________ and the acceleration points
__________.
14. At the peak of the motion, the velocity is __________ and the acceleration points
__________.
15. As the ball is going downwards, the velocity points __________ and the acceleration points
__________.
16. When a body moves in circular motion at constant speed, the velocity and acceleration point
__________.
17. If an object’s acceleration is nonzero, its velocity must be __________.
18. The distance below the rooftop is __________.
19. The velocity is __________.
20. The acceleration is __________.
21. The distance from the starting point is __________.
22. The acceleration after starting from rest is __________.
23. The velocity acquired after starting from rest is __________.
24. A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is
__________.
25. A racecar driver steps on the gas, changing his speed from 10 m/s to 30 m/s in 4 seconds.
The acceleration of the racecar is _________.
26. A racecar driver steps on the gas, and his racecar travels 20 meters in 2 seconds starting
from rest. The acceleration of the racecar is __________.
27. A glider is in a banked curve with a radius of 125 m radius curve at a constant speed of 10
m/s. Its acceleration is __________.
28. A pilot puches the throttle lever forward, changing his speed from 0 m/s to 40 m/s in 7
seconds. The acceleration of the racecar is _________.
29. An aircraft undergoes a constant acceleration of 11 m/s2 for 12 seconds. The distance
traveled is __________.
MATCHING
Match each item with the correct statement below.
a.
acceleration
h.
metric
b.
Aristotle
i.
milli–
c.
centripetal acceleration
j.
period
d.
English
k.
scalar
e.
frequency
l.
velocity
f.
Galileo Galilei
m.
vector
g.
kilo
n.
Constant acceleration
1. the number of cycles of a periodic process that occur per unit time
2. the slope of a distance versus time graph equals this
3. any physical quantity that has a direction associated with it
4. any physical quantity that does not have a direction associated with it
5. the rate of change of velocity
6. time it takes for one complete cycle of a periodic process
7. any object moving in a circle undergoes this
8. metric prefix that means one thousand
9. correctly analyzed the motion of a falling body
10. most widely used system of measure
11. An object undergoing free fall in a vacuum experiences
PROBLEM
1. The Gateway Arch in St. Louis, Missouri is 630 feet tall. Express this distance in meters and
in kilometers.
2. Devil’s Tower National Monument is 1280 ft high. Convert this height to meters.
3. A runner in a race takes 2.7 seconds to go from the 40 meter mark to the 70 meter mark.
(a) What is the runner’s speed?
(b) How far would the runner go in 8 seconds if this speed is maintained?
(c) How long did it take the runner to cover the first 40 m (assuming the same speed was
maintained)?
4. During takeoff a jet aircraft goes from 0 m/s to 60 m/s in 5 seconds.
(a) What is the jet’s acceleration?
(b) What is the jet’s speed after 22 seconds?
5. The acceleration of a ball as it rolls down a ramp is 3 m/s2. It starts from rest.
(a) What is the ball’s speed after 4 seconds?
(b) How far does the ball travel during the 4 seconds?
6. A race car goes around a curve at 50 m/s. The radius of the curve is 400 m. What is the car’s
acceleration?
7. A ‘cliff diver’ in Mexico dives off a high cliff and falls for 2.3 seconds before hitting the
water./
(a) How fast is the diver going at impact?
(b) How far below the cliff is the diver at this point?
8. A high performance aircraft is executing a tight turn at 135 m/s. The radius of the curve is
750 m. What is the aircraft’s acceleration?
