Multiple Choice (Value 15)
Identify the choice that best completes the statement or answers
the question.
|
|
|
1.
|
A 10.0-ohm resistor,
20.0-ohm resistor, and 25.0-ohm resistor are connected in series across a 110-V supply. Calculate the
current in the circuit. a. | 2.0 amps | c. | 55 amps | b. | 4.5 amps | d. | 11 amps |
|
|
|
2.
|
The magnitude of the
centripetal acceleration of a body moving at a speed of 9 m/s in a circle of radius 3 m
is: a. | 3.0 m/s2 | c. | 8.0 m/s2 | b. | 4.0 m/s2 | d. | 27.0
m/s2 |
|
|
|
3.
|
If light from the sun takes 5.5 hours to reach
Pluto (the planet not the dog!) how far is that planet from the sun?
a. | 9.9x107 km | c. | 4.6x105 km | b. | 5.9x109
km | d. | 1.5x104 km |
|
|
|
4.
|
An object is thrown
vertically upward. Which pair of graphs best represents the object’s kinetic energy and
gravitational potential energy as functions of its displacement while it rises?
|
|
|
5.
|
A projectile launched
at an angle of 45° above the horizontal travels through the air. Compared to the
projectile’s theoretical path with no air friction, the actual trajectory of the projectile
with air friction is: a. | lower and shorter | c. | higher
and shorter | b. | lower and
longer | d. | higher and longer |
|
|
|
6.
|
A rock falls from rest
a vertical distance of 0.72 meter to the surface of a planet in 0.63 second. The magnitude of the
acceleration due to gravity on the planet is: a. | 1.1 m/s2 | c. | 3.6 m/s2 | b. | 2.3
m/s2 | d. | 9.8
m/s2 |
|
|
|
7.
|
A bullet fired horizontally takes 4.0 s to reach
the ground. The height of the gun that fired is
|
|
|
8.
|
The speed of an object
undergoing constant acceleration increases from 8.0 meters per second to 16.0 meters per second in 10
seconds. How far does the object travel during the 10 seconds? a. | 3.6 x 102 m | c. | 1.2 x 102 m | b. | 1.6 x 102
m | d. | 8.0 x 102
m |
|
|
|
9.
|
Which diagram best represents the gravitational
forces, Fg, between a satellite, S, and Earth
|
|
|
10.
|
A series circuit contains four resistors. The
equivalent resistance of the circuit is equal to
a. | R/4 | c. | R1+R2+R3+R4 | b. | 4R | d. | [R1+R2+R3+R4]/4 |
|
|
|
11.
|
Approximately how
much time does it take light to travel from the Sun to Earth? a. | 2.00 x 10–3 s | c. | 5.00 x 102 s | b. | 1.28 x
100 s | d. | 4.50 x 1019
s |
|
|
|
12.
|
A ball is thrown at an angle of
60o to the horizontal with an initial velocity of 30 m/s. After 2.0 s it’s
horizontal distance is:
|
|
|
13.
|
A students throws a baseball to a friend. As the ball moves through the air it
is called a ____ .
a. | bullet | c. | projectile | b. | home run | d. | target |
|
|
|
14.
|
A bullet has an upward velocity of 98 m/s and a
horizontal component of 49 m/s. The bullet reaches its highest at:
|
|
|
15.
|
The magnitude of the centripetal acceleration of a
body moving at a speed of 9 m/s in a circle of radius 3 m is:
a. | 3 m/s2 | c. | 8
m/s2 | b. | 4
m/s2 | d. | 27
m/s2 |
|