Intro to Physics Midterm Review
1. When graphing speed vs. time; time is plotted on the ___________________ axis.
2. The quantity that changes due to the variation is called the ____________________.
3. The quantity that is deliberately varied is called the ______________________.
4. When measuring, which ruler is more accurate the centimeter or the millimeter?
5. Which is the correct order of metrics going from a large unit to a smaller unit?
________________________________________________________________
6. 1500 mg = _______g?
7. 2 l = ________ml?
8. 165 cm = ________mm
9. 18 km = ________m?
10. 156 g = ________kg?
11. What two dimensions, in addition to mass, are commonly used by physicists and we used
in class? _______________________________________________
12. The symbol mm represents a _____________________________
13. The SI base unit used to measure mass is the ____________________________.
14. The SI base unit for time is ___________________________.
15. The symbol cm represents a __________________________ .
16. The radius of Earth is 6 370 000 m. Express this measurement in km in scientific
notation. ______________________________
17. Use <, >, or =
56 cm ______ 6 m
18. 2000 mg =______g
19. 5.6 kg = ________g
20. Calculate the following, and express the answer in scientific notation:
21.4 + 15 + 17.17 + 4.003
21. Convert 1.8 x 103 to an ordinary decimal.
22. Convert 2 x 10-1 to an ordinary decimal.
23. A weather balloon records the temperature every hour. From the table above, does the
temperature increase, decrease, remain constant or decrease and then increase?
24. The time required to make a trip of 100.0 km is measured at various speeds. From the
graph above, what speed will allow the trip to be made in 2 hours?
25. Determine the percentage error in: Experimental Value = 135.2 Accepted Value = 124.8
mg
26. Which of the following is the cause of acceleration: Speed, inertia, force or velocity?
27. Which of the following statements does not describe force?
a. Force causes objects at rest to remain stationary.
b. Force causes objects to start moving.
c. Force causes objects to stop moving.
d. Force causes objects to change direction.
28. What causes a moving object to change direction? ______________________
29. Which forces arises from direct physical contact between two objects?
30. A Newton is equivalent to which of the following quantities?
a. kg
c. kg x m/s
b. kg x m/s
d. kg x(m/s)
31. If the net force is doubled, by how much does the acceleration change?
32. ____________________is the tendency of an object to maintain its state of motion?
33.
True or False: Whenever an object exerts a force on another object, the second object
exerts a force of the same magnitude, but in the opposite direction to that of the first
object. (Hint: Newton!)
34. If the mass is doubled, by how much is the acceleration changed?
35. If a net force is acting on an object, then the object is definitely ___________________.
36. The acceleration of an object is ____________________proportional to the net external
force acting on the object and ______________________proportional to the mass of the
object.
37. In general, Fnet equals _________________________
38. According to Newton’s second law, when the same force is applied to two objects of
different masses, (1 is heavier!!!) the object with greater mass will experience a
______________________acceleration, and the object with less mass will experience a
______________________ acceleration.
39. Susie Smart finds she weighs 250 N. Calculate her mass.
40. What is the weight of 3 kg of yogurt in Newton’s?
41. The statement by Newton that for “every action there is an equal but opposite
reaction” is which of his laws of motion?
42. A speedboat pulls 2 water-skiers, each with a mass of 55 kg. What is the total weight of
the water-skiers in Newton’s?
43. Newton’s third law of motion involves the interactions of
________________________________________________________________
44. An apple weighs about 1 N. What is it mass in kilograms? What is its weight in pounds?
45. 1 kg weighs about 2.2 lbs. If you weigh 160 lbs, what is your mass in kg?
46. Mass is ___________________________________________________.
47. The magnitude of the gravitational force acting on an object is __________________
48. A measure of the quantity of matter is _______________________________
49. A change in the gravitational force acting on an object will affect the object’s
______________________________________
50. What are the units of the coefficient of friction?
51. Acceleration is ______________________________.
52. Acceleration is ____________________________________________________.
53. What is air resistance?
54. What is the formula for weight?
55. According to Newton’s 3rd Law, forces always occur _________________________.
56. True or False Whenever 1 object exerts a force on a 2nd object, the 2nd object always
exerts the same amount of force back on the 1st object. (Hint: Newton!)
57. True or False A rocketship is pushed forward by gases that are forced out the back of the
ship.
58. A man weighing 500 N sits on the floor. He exerts a force on the floor of ________N.
59. An unfortunate bug splatters against the windshield of a moving car. Compared to the
force of the car on the bug, the amount of force of the bug on the car is ____________.
60.What is “mu”
61. A force does work on an object if a component of the force
____________________________________________________________________
62. Work is done when __________________________.
63. What is the common formula for work? Assume that W is the work, F is a constant force,
v is the change in velocity, and d is the displacement.
64. Create a scenario where there is work done?
65. Create a scenario where there is no work done?
66. A child moving at constant velocity carries a 2 N ice-cream cone 1 m across a level
surface. What is the work done on the ice-cream cone?
67. A worker does 25 J of work lifting a bucket, then sets the bucket back down in the same
place. What is the total work done on the bucket?
68. A construction worker pushes a wheelbarrow 5.0 m with a horizontal force of 50.0 N.
How much work is done by the worker on the wheelbarrow?
69. A horizontal force of 200 N is applied to move a 55 kg television set across a 10 m level
surface. What is the work done by the 200 N force on the television set?
70. List the energy forms that are associated with an object in motion?
71. List the energy forms that are associated with an object due to its position?
72. What energy forms is not involved in hitting a tennis ball?
73. The main difference between kinetic energy and potential energy is that
__________________________________________________________________
74. Gravitational potential energy is always measured in relation to __________________.
75. _________________________________ is the rate at which energy is transferred?
76. ________________________________ is the rate at which work is done?
77. ___________________________ the units of power?
78. What is the average power supplied by a 60.0 kg person running up a flight of stairs a
vertical distance of 4.0 m in 4.2 s?
79. A more powerful motor can do __________ work in a ________________ time interval.
80. What is the formula for calculating an object’s momentum, p?
81. What are the SI units for momentum?
82. A roller coaster climbs up a hill at 4 m/s and then zips down the hill at 30 m/s. The
momentum of the roller coaster is greater __________________ up the hill than down
thehill.
83. A person sitting in a chair with wheels stands up, causing the chair to roll backward
across the floor. The momentum of the chair _______________________________.
84. The change in an object’s momentum is equal to _____________________________.
85. Give an example of a visible change in momentum?
86. Give an example of a significant change in momentum?
87. A 75 kg person walking around a corner bumped into an 80 kg person who was running
around the same corner. The momentum of the 80 kg person: increased, decreased, or
stayed the same.
88. A 20 kg shopping cart moving at a velocity of 0.5 m/s collides with a store wall
and stops. The momentum of the shopping cart increased, decreased, or stayed
the same.
89.
Two objects with different masses collide and bounce back after a collision. Before the
collision, the two objects were moving at velocities equal in magnitude but opposite in
direction. After the collision describe the momentum of the objects?
90. A soccer ball collides with another soccer ball at rest. The total momentum of the balls
________________________________.
91.
Two skaters stand facing each other. One skater’s mass is 60 kg, and the other’s mass is
72 kg. If the skaters push away from each other without spinning, describe their
momentum.
92. Two swimmers relax close together on air mattresses in a pool. One swimmer’s mass is
48 kg, and the other’s mass is 55 kg. If the swimmers push away from each other,
Describe their momentum.
93. To calculate impulse, you multiply _______________by _________________.
94. To calculate momentum, you multiply _____________by ______________.
95. Which has more momentum, a large truck moving at 30 miles per hour or a small truck
moving at 30 miles per hour?
96. Compared to a sports car moving at 30 miles per hour, the same sports car moving at 60
mile per hour has _________________ momentum.
97. If the momentum of an object changes and its mass stays the same, ________________ is
acting upon it.
98. In order to increase the momentum of a golf ball, we could _______________________.
99. The reason dashboards are padded in cars is that they __________________________.
100. What is an elastic collision?
101. What is an inelastic collision?
102. A freight train rolls down the track. If it were to keep rolling at the same speed but had
twice as much mass, its momentum would be _________________________________.
103. Name two types of collisions.
104. A boxer if trained well knows how to “ride the punch.” What does that mean in terms of
momentum?
105. If the momentum of an object changes and its mass remains constant ______________.
106. The momentum change of an object is equal to the ____________________________.
107. In order to catch a baseball, you are supposed to move your hand backward in the
direction of the ball’s motion. Doing this reduces the force of impact on your hand
because ____________________________.
108. What is the momentum of a 10kg bowling ball at 3 m/s?
109. What impulse occurs when an average force of 16 N is exerted on a cart for 3 s?
110. What is the momentum of a 65 kg carton that slides at 2 m/s across an icy surface?
111. How much momentum does a 2000 kg truck have traveling at 25 m/s?
112. If the truck from the above problem hits into a haystack and stops in 1 s, calculate the
average force it exerts on the haystack.
113. What impulse occurs when an average force of 28 N is exerted on a cart for 3.0 s?