If I1 goes to the right through R1, I2 goes to the right through R2, and I3 goes to the right through R3, what is the resulting equation resulting from applying Kirchhoffs junction rule at point b?
a.
I1 +
I2 +
I3 = 0
b.
I1 +
I2 I3 = 0
c.
I1 I2 +
I3 = 0
d.
I1 I2 I3 = 0
[Ques. 2] In 20 minutes, Kara ran 2.40 km on a treadmill facing due east. Relative to the gym, what were her displacement and average velocity during this time interval?
a. 0; 0
b. 0; 2.00 m/s
c. 2.40 km, east; 0
d. 2.40 km, east; 2.00 m/s, east
e. 2.40 km, west; 2.00 m/s, west
[Ques. 3] The area under a graph of ax vs. t from t = ti to t = tf represents
a. xf xi.
b. vf vi.
c. xavg.
d. vavg.
e. aavg.
[Ques. 4] A skier leaves a ski jump with a horizontal velocity of 29.4 m/s. The instant before she lands three seconds later, the magnitudes of the horizontal and vertical components of her velocity are:
a. 0; 29.4 m/s.
b. 29.4 m/s; 0.
c. 29.4 m/s; 29.4 m/s.
d. 29.4 m/s; 41.6 m/s.
e. 41.6 m/s; 41.6 m/s.
[Ques. 5] What is Kirchhoffs 1st equation for this junction?
a.
I1 =
I2 +
I3 b.
I2 =
I1+
I2 c.
I3 =
I1 +
I2 d.
I1 +
I2 +
I3 = 0
[Ques. 6] A car travels north at 30 m/s for one half hour. It then travels south at 40 m/s for 15 minutes. The total distance the car has traveled and its displacement are:
a. 18 km; 18 km S.
b. 36 km; 36 km S.
c. 36 km; 36 km N.
d. 90 km; 18 km N.
e. 90 km; 36 km N.
[Ques. 7] Which two resistors are in parallel with each other?
a.
R and
R4 b.
R2 and
R3 c.
R2 and
R4 d.
R and
R1
[Ques. 8] A juggler throws two balls to the same height so that one is at the halfway point going up when the other is at the halfway point coming down. At that point:
a. Their velocities and accelerations are equal.
b. Their velocities are equal but their accelerations are equal and opposite.
c. Their accelerations are equal but their velocities are equal and opposite.
d. Their velocities and accelerations are both equal and opposite.
e. Their velocities are equal to their accelerations.
[Ques. 9] Three resistors connected in parallel have individual values of 4.0, 6.0, and 10.0 , respectively. If this combination is connected in series with a 12-V battery and a 2.0- resistor, what is the current in the 10.0- resistor?
a.
0.55 A
b.
1.0 A
c.
11 A
d.
16 A
[Ques. 10] Two children start at one end of a street, the origin, run to the other end, then head back. On the way back Joan is ahead of Mike. Which statement is correct about the distances run and the displacements from the origin?
a. Joan has run a greater distance and her displacement is greater than Mike's.
b. Mike has run a greater distance and his displacement is greater than Joan's.
c. Joan has run a greater distance, but her displacement is less than Mike's.
d. Mike has run a greater distance, but his displacement is less than Joan's.
e. Mike has run a shorter distance, and his displacement is less than Joan's.
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