Part One Multiple Choice Exam Flashcards
1
Q
The language of science is... A. mathematics B. Latin C. Chinese D. Arabic
A
A. mathematics
2
Q
Somebody who says, “that’s only a theory” likely doesn’t know that a scientific theory is…
A. An educated guess
B. A hyothesis
C. A vast synthesis of well tested hypotheses and facts.
D. None of these.
A
C. A vast synthesis of well tested hypotheses and facts.
3
Q
The force needed to keep a ball rolling along a bowling alley is... A. Due to gravity B. An inertial force C. A slight breeze D. None of these
A
D. None of these
4
Q
The equilibrium rul ∑F= 0, applies to objects... A. at rest. B. moving at a constant velocity. C. both D. Neither
A
C. both
5
Q
If gravity between the Sun and Earth suddenly vanished, Earth would continue moving in. A. A curve B. A straight line C. An outward spiral D. An inward spiral
A
A. A curve
6
Q
The average speed of a gazelle traveling a distance of 2 km in a time of one-half hour is... A. 1 km/h B. 2 km/h C. 4 km/h D. more than 4 km/h
A
C. 4 km/h
7
Q
An object in free fall undergoes an increase in…
A. speed
B. acceleration
C. both speed and acceleration
A
A. speed
8
Q
If a falling object gains 10 m/s each second it falls, its acceleration is.. A. 10 m/s B. 10 m/s per second. C. both D. neither
A
B.
9
Q
An object with a huge mass also must have a huge... A. weight B. Volume C. size D. surface area
A
A
10
Q
The amount of air drag on an 0.8-N flying squirrel dropping vertically at terminal velocity is..
A. less than 0.8 N
B. 0.8 N
C. more than 0.8 N
D. dependent on the orientation of its body
A
B. 0.8 N
11
Q
Why the acceleration of free fall is the same for all masses is explained by Newton's... A. first law B. second law C. third law D. law of gravity
A
B. second law
12
Q
When a cannon ball is fired from a cannon, both the cannonball and the cannon experience equal... A. amounts of force B. accelerations. C. Both D. neither
A
A. amounts of force
13
Q
The team that wins in a tug-of-war is the team that…
A. produces more tension in the rope than the opponent
B. pushes hardest on the ground
C. both
D.neither
A
B. pushes hardest on the ground
14
Q
An airplane with its nose pointing north with an airspeed of 40 km/h in a 30-km/h crosswind (at right angles) has a groundspeed of.. A. 30 km/h B. 40 km/h C. 50 km/h D. 60 km/h
A
C. 50 km/h
15
Q
The impulse momentum relationship is a direct result of Newton's.. A. first law B. second law C. third law D. law of gravity
A
B. second law
16
Q
A big fish swims upon and swallows a small fish at rest. Right after lunch, the fattened big fish has a change in... A. speed B. momentum C. both D. neither
A
A.
17
Q
The work done on a 100-kg crate that is hoisted 2 m in a time of 4 s is... A. 200 J B. 500 J C. 800 J D. 2000 J
A
D. 2000 J
18
Q
The power required to raise a 100-kg crate a vertical distance of 2 m in a time of 4 s is... A. 200 W B. 500 W C. 800 W D 2000 W
A
B. 500 W
19
Q
A model car with 3 times as much speed as another has a kinetic energy that is... A. the same B. twice C. 3 times D. None of these
A
D. none of these
20
Q
Lift a 100-N crate with an ideal pulley system by pulling a rope downward with 25 N of force. For every 1-m length of rope pulled down, the crate rises.. A. 25 cm B. 25 m C. 50 cm D. none of these
A
A. 25 cm
21
Q
When 100 J are put into a device that puts out 40 J of useful work, the efficiency of the device is.. A. 40% B. 50% C. 60% D. 140%
A
A. 40%
22
Q
A machine cannot multiply A. forces B. distances C. energy D. none of the above
A
C. energy
23
Q
When a tin can is whirled in a horizontal circle, the net force on the can acts... A. inward B. outward C. upward D. none of these
A
A. inward
24
Q
A torque is a force.. A. like any other force B. multiplied by a lever arm C. that is fictitious D. that accelerates things
A
B. multiplied by a lever arm
25
```
The rotational inertial of an object is greater when most of the mass is located...
A. near the rotational axis
B. away from the axis
C. on the rotational axis
D. off center
```
B. away from the axis
26
```
If the sun were twice as massive, its pull on Mars would be
A. unchanged
B. twice as much
C. half as much
D. 4 times as much
```
B. twice as much
27
```
The highest ocean tides occur when the earth and Moon are...
A. lined up with the sun
B. at right angles to the sun
C. at any angle to the sun
D. lined up during spring
```
A. lined up with the sun
28
```
The component of velocity that can remain constant for a tossed baseball is...
A. horizontal
B. vertical
C. Either of these
D. none of these
```
A. horizontal
29
```
The magnitude of gravitational force on a satellite is constant if the orbit is...
A. parabolic
B. circular
C. elliptical
D. all of these
```
B. circular
30
```
A satellite in Earth orbit is above Earth's
A. atmosphere
B. gravitational field
C. both
D. neither
```
A. atmosphere
