Physics 2007-20008
Mid-Term Exam
Choose the best answer. Good luck!
1. Vectors have _______________ and _________________.
A) Magnitude, Forces
B) Magnitude, Direction
C) Forces, Direction
D) All of the above
2. Before solving a problem, you should:
A) Cry
C) Ask Mr. Baden for Help
B) Identify the variables
D) None of the above
3. In the equations of motion ‘a’ stands for:
A) Altitude
C) Acceleration
B) Average
D) None of the above
4. In the equations for planetary orbits ‘a’ stands for
A) Orbital distance
B) Period
C) Acceleration
D) None of the above
5. The symbol for position in the equations of motion is:
A) x
B) y
C) v
D) All of the above
6. In the equations of motion, X – X0 stands for:
A) time
B) Velocity
C) Acceleration
D) None of the above
7. In order to find the magnitude of a vector, given its X and Y components you use:
A) An Equation of Motion
B) The Vector Equation
C) The Pythagorean Theorem
D) None of the Above
8. Solve for x: 7x + 14 = 35. x =
A) 3
C) 7
B) 14
D) none of the above
9) Solve the following for x. 12 / x = 15 / 5. X =
A) 36
C) ¼
B) 4
D) None of the above
10) cos 30 =
A) 0.866
B) 0.717
B) 0.5
D) None of the above
11. The magnitude of
Vector A is:
A) 3
C) (3, 4)
A
B) 4
D) 5
12. The Magnitude of
Vector B is:
A) 0
B) 5
C) (0, 5)
D) -5
B
C
13. The Magnitude of
Vector C is:
A) (4, 4)
B) (1, 5)
C) 32
D) √32
14. Which is the resultant
vector when you add A
and B?
A) E
B) F
C) G
D) H
15. Which is the resultant
Vector of A minus C?
A) E
B) F
C) G
D) H
F
G
H
E
16. If vector G has x component of 1, and a y component of 2; and vector H has x
component 3 and y component 2, what is the magnitude of J. Where G + H = J?
A) 1
B) (3, 4)
C) 8
D) 5
17. If vector K has x component of 6, and a y component of 22; and vector M has x
component 2 and y component -7, what is the magnitude of J. Where K + M = N?
A) (8, 15)
B) √17
C) 17
D) (8, 29)
18. 10 km = ___________________ m.
A) 10
C) 10,000
B) 0.01
D) None of the above
19. There are 1.83 fathoms in 1 meter, and 0.36 fathoms in 1 rod. How many rods
are in 9.84 m?
A) 50.0
B) 6.5
C) 14.9
D) None of the above
20. The SI unit for mass is the:
A) gram
C) Newton
B) kilogram
D) All of the Above
21. The slope of a velocity vs. time graph represents:
A) Displacement
B) Velocity
C) Acceleration
D) None of the above
22. The area underneath a velocity vs. time graph represents:
A) Displacement
B) Velocity
C) Acceleration
D) None of the Above
23. If you live 12,000 m (7.45 miles) from school, and it takes you 600 s (10 minutes)
to get to school every morning, what is your average velocity?
A) 2 km/s
B) 2 m/s
C) 74.5 m/s
D) None of the above
24. From the following graph of velocity vs. time find the total displacement.
A) 35 m
B) 60 m
C) 5 m/s
D) None of the Above
25. What is the velocity of the hippopotamus whose motion is represented in the
following graph of displacement vs. time?
A) 8 m/s
B) 0.6 m/s
C) 0.5 m/s
D) None of the Above
26. If a car averages 110 km/h for 6 hours, how far does it travel?
A) 660 km
B) 18.3 km
C) 75600 m
D) None of the above
27. If you are in an elevator which is accelerating downward at 9.8 m/s2 and you
release a tennis ball at shoulder height what would the tennis ball look like it
was doing to you?
A) Fall to the bottom of the elevator
B) Float at shoulder height
C) Rise up to the ceiling
D) None of the above
28. If you are in a glass elevator which is accelerating downward at 9.8 m/s 2 and
you release a tennis ball at shoulder height what would the tennis ball look
like it was doing to a person watching from outside the elevator?
A) Rest on the bottom of the elevator
B) Fall at the same speed as the elevator
C) Get pushed down by the ceiling of the elevator
D) None of the above
29. At what angle should you fire a cannon to achieve the maximum range?
A) 30 degrees
B) 45 Degrees
C) degrees
D) None of the above
30. A giraffe gallops across the plain at a constant acceleration of 0.5 m/s2, and he
covers 1000 m in 30 s, what was the initial velocity of the giraffe?
A) 7.50 m/s
B) 0.15 m/s
C. 40.83 m/s
D) None of the Above
31. A pig catapult launches a pig at a 50 degree angle with an initial velocity of 30
m/s. What is the initial Horizontal velocity of the pig?
A) 22.98 m/s
B) 19.28 m/s
C) 35.75 m/s
D) None of the above
32. What is the initial vertical velocity of the pig in question 31?
A) 22.98 m/s
B) 19.28 m/s
C) 35.75 m/s
D) None of the above
33. A bouncy ball bounces off the ground at a 40 degree angle, at time t = 0, with an
initial velocity of 15 m/s. How long is it in the air?
A) 9.6 s
B) 9.8 s
C) 5.5 s
D) None of the above
34. A soccer ball is kicked off the ground with an initial velocity of 12 m/s and lifts
off at a 30 degree angle, how far away will it land?
A) 7.35 m
B) 1.22 m
C) 12.73 m
D) None of the above
35. A basketball is thrown at an angle of 45 degrees with an initial velocity of 21 m/s,
what is the maximum height achieved by the basketball?
A) 6.2 m
B) 1.01 m
C) 4.9 m
D) None of the above
36. A car accelerates at 10 m/s2 by exerting a 5000 N force on the road. This tells us
that the mass of the car is 500kg. This is an example of.
A) Newton’s 1st Law
B) Newton’s 2nd Law
C) Newton’s 3rd Law
D) None of the above
37. Forces come in pairs is part of which of Newton’s Laws?
A) Newton’s 1st Law
B) Newton’s 2nd Law
C) Newton’s 3rd Law
D) None of the above
38. Newton’s First law states:
A) An Object’s velocity will not change unless an outside forces acts on the object.
B) F = m * a
C) For every action there is an equal but opposite reaction.
D) All of the above
39. Newton’s Second Law states:
A) An Object’s velocity will not change unless an outside forces acts on the object.
B) F = m * a
C) For every action there is an equal but opposite reaction.
D) All of the above
40. Newton’s Third Law states:
A) Forces come in pairs.
B) 2 forces have equal magnitudes
C) 2 forces have opposite directions
D) All of the Above
41) In an Action/reaction pair of forces the forces act in ___________ directions.
A) The same
B) Opposite
C) Different
D) All of the Above
42) A force is any
A) Jedi mind trick
B) Magically impenetrable field
C) Push or pull
D) None of the above
43) Forces have _________________ and _________________.
A) Magnitude, Forces
B) Magnitude, Direction
C) Luke, Annakin
D) None of the above
44) Forces exerted between two objects which are touching are said to be
transmitted by:
A) Direct Contact
B) Indirect Contact
C) Touchy forces
D) None of the above
45. When a rocket pushes on the air, the air pushes back on the rocket, which of
Newton’s Laws is this an example of?
A) First
B) Second
C) Third
D) All of them
46) Comet Shoemaker-Levy 9 traveled through space in a straight line, at a constant
speed until it crashed into Jupiter, which applied a force and stopped the comet.
Which of Newton’s Laws would this best illustrate?
A) First
B) Second
C) Third
D) All of them
47. A 15 kg piano weighs:
A) 15 N
B) 147 N
C) 15 kg
D) None of the above
48. The weight of a 70 kg Box on earth is:
A) 686 N
B) 70 kg
C) 686 lbs.
D) None of the Above
49. A 1960 N piano has a mass of:
A) 19208 kg
B) 1960 kg
C) 200 kg
D) None of the Above
50. A 2 kg Physics Book is sitting on a table, what is the Normal force supplied by
the table?
A) 19.6 N
B) 2 N
C) 0.2 N
D) None of the Above
51. A large cat weighs 900 N, how much Normal Force is the ground supplying?
A) 91.8 N
B) 8820 N
C) 900 N
D) None of the above
52. A 100 kg sled is being pulled across the snow, coefficient of friction 0.1, with a
constant velocity. How much force is required to pull the sled in this way?
A) 980 N
B) 10 N
C) 9800 N
D) None of the above
53. Two builders just barely manage to start a 150 kg refrigerator sliding across a
linoleum floor, coefficient of friction = 0.2, how much force are they exerting?
A) 294 N
B) 30 N
C) 150 N
D) None of the Above
54. If a 100 N force pulls a 400 kg log across the forest floor at a constant velocity
what is the coefficient of friction between the log and the forest floor?
A) 40,000
B) 0.25
C) 4
D) none of the above
55. While playing tug of war a team with a total mass of 600 kg is accelerating at 3
m/s2. What force is being applied to the team?
A) 200 N
B) 1800 N
C) 17640 N
D) none of the above
56. A rabbit applies a force of 20 N to the ground to propel a bound causing an
acceleration of 12 m/s2, what was the mass of the rabbit?
A) 1.67 kg
B) 0.6 kg
C) 24.0 kg
D) None of the Above
57. A 10 N force will cause a 5 kg mass to accelerate at how many meters per
second?
A) 0.5
B) 50
C) 2
D) None of the above
58. A soccer ball is kicked by two players at the same time. If one player kicks the
ball west with a 60 N force and the other kicks the ball north with an 80 N force,
what is the net force on the soccer ball?
A) 140 N
B) 20 N
C) 100 N
D) None of the Above
59. A teacher hits his head on the desk in frustration with a 50 N force. How much
force does the desk apply to the teacher?
A) 490 N
B) 50 N
C) 5.1 N
D) None of the Above
60. A 640 N sign is suspended by 2 wires which are separated by 100 degrees, what
is the tension in each wire?
A) 497.9 N
B) 0.002 N
C) 417.7 N
D) None of the Above
A 30 kg child is sitting on a slide which is tilted at a 60 degree angle.
61. What is the component of the gravitational force down the slide?
A) 254.6 N
B) 147.0 N
C) 26.0 N
D) None of the Above
62. What is the Normal Force on the child?
A) 254.6 N
B) 147.0 N
C) 26.0 N
D) None of the Above
63. If the child is moving down the slide at a constant velocity what is the frictional
force on the child?
A) 254.6 N
B) 147.0 N
C) 26.0 N
D) None of the Above
64. If the slide is a magic Frictionless Physics Slide what is the acceleration of the
child down the ramp?
A) 294 m/s2
B) 26 m/s2
C) 8.49 m/s2
D) None of the Above
65. If an object is traveling in a circle in what direction is its acceleration?
A) Inward (toward the center)
B) outward
C) Around the circle
D) none of the above
66. A 0.4 kg stuffed animal spins around an industrial washing machine at a radius
of 2 m. If it completes one revolution in 0.6 s what is the amount of centripetal force
on the stuffed animal?
A) 20.94 N
B) 87.73 N
C) 72.35 N
D) None of the above
67. A cyclist travels around a circular track with a (constant) velocity of 18 m/s, if
the track has a radius of 30 m, what is the acceleration of the cyclist?
A) 426.37 m/s2
B) 540.65 m/s2
C) 1.66 m/s2
D) None of the above
68. A musician drags a drum across the floor of a stage by applying a 100 N force, if
she moves the drum 17 m how much work is done?
A) 1700 J
B)5.88 J
C) 980 J
D) None of the Above
69. 11000 J of work are done in 100 s, how much power is generated?
A) 11 W
B) 0.009 W
C) 110 W
D) None of the above
70. The unit J is the:
A) Joule
B) Jordan
C) Johannes
D) None of the Above
71. Planet’s orbit in:
A) Circles
B) Ellipses
C) Squares
D) None of the Above
72. Planets travel at the same speed while they orbit the sun.
A) True
B) False
C) Both
D) Neither
73. If asteroid Sassafrass orbits the sun at 5 times the average orbital distance of the
earth, what is the period of asteroid Sassafrass in earth years?
A) 5 years
B) 1/5 Years
C) 25 years
D) None of the Above
74. Two Satellite are orbiting earth, Satellite Buzz is 2 times as far away from earth
as Satellite Lightyear. If both Satellites have the same mass then the gravitational
force between Satellite Lightyear and the earth is _____ the size of the gravitational
force between Satellite Buzz and the earth.
A) Twice
B) ½
C) ¼
D) None of the Above
75. The 100,000 kg Space shuttle is docking with the 6.5 x 108 kg Space Station.
When the two machines are 7 m apart, what is the gravitational force between
them?
A) 541.9 N
B) 67.7 N
C) 253.8 N
D) None of the Above
76. If NASA wanted to move the moon so that it had a longer period, closer to 30
days, should they use rockets to _________________________.
A) Move the moon closer to earth
B) Blow the moon up
C) Move the moon farther away from earth
D) None of the Above
77. An alien spacecraft is orbiting earth at 3 x 1010 m away from the center of the
earth (me = 5.97 x 1024 kg). How fast is the UFO traveling?
A) 115 m/s
C) 1.64 * 109 m/s
B)6.65 * 104 m/s
D)None of the Above
78. What is the strength of the gravitational field 3 x 107 m from the center of
Planet X (mass = 8.35 x 1028 kg) where a 200 kg satellite is in orbit making
observations?
A)1.23 x 106 m/s2
B) 6188 m/s2
C) 7.48 x 1023 m/s2
D) None of the Above
79. Which Greek letter is Θ (capital) θ (lower case)?
80. Which Greek Letter is Η (capital) η (lower case)?
A) Theta
B) Heta
C) Nu
D) None of the above