Predict/Calculate Two trucks drive directly away from one another on a straight line, as indicated in Figure 9-37 . The trucks drive with their speeds adjusted precisely so that the center of mass (CM) of the two trucks remains stationary—that is, the velocity of the center of mass is zero The mass and speed of truck 1 are m 1 = 8400 kg, and v 1 = 12 m/s, respectively The mass of truck 2 is m 2 = 10,200 kg. (a) Is the speed of truck 2 greater than, less than, or equal to the speed of truck 1? Explain (b ) Find the speed of truck 2. Figure 9-37 Problem 64
Predict/Calculate Two trucks drive directly away from one another on a straight line, as indicated in Figure 9-37 . The trucks drive with their speeds adjusted precisely so that the center of mass (CM) of the two trucks remains stationary—that is, the velocity of the center of mass is zero The mass and speed of truck 1 are m 1 = 8400 kg, and v 1 = 12 m/s, respectively The mass of truck 2 is m 2 = 10,200 kg. (a) Is the speed of truck 2 greater than, less than, or equal to the speed of truck 1? Explain (b ) Find the speed of truck 2. Figure 9-37 Problem 64
Predict/Calculate Two trucks drive directly away from one another on a straight line, as indicated in Figure 9-37. The trucks drive with their speeds adjusted precisely so that the center of mass (CM) of the two trucks remains stationary—that is, the velocity of the center of mass is zero The mass and speed of truck 1 are m1 = 8400 kg, and v1 = 12 m/s, respectively The mass of truck 2 is m2 = 10,200 kg. (a) Is the speed of truck 2 greater than, less than, or equal to the speed of truck 1? Explain (b) Find the speed of truck 2.
3. By using the fact that around any closed loop the sum of the EMFS = the sum of the PDs. Write
equations for the two loops shown in the cct below.
40
ΔΩ
I₂
4V
(loop1
20 (loop2) 2v
I+12
Use these equations to show that the current flowing through the 20 resistor is 0.75A
5. A potential divider circuit is made by stretching a 1 m long wire with a resistance of 0.1 per cm
from A to B as shown.
8V
A
100cm
B
sliding contact
5Ω
A varying PD is achieved across the 5 Q resistor by moving the slider along the resistance wire.
Calculate the distance from A when the PD across the 5 Q resistor is 6 V.
4. A voltmeter with resistance 10 kQ is used to measure the pd across the 1 kQ resistor in the circuit
below.
6V
5ΚΩ
1ΚΩ
V
Calculate the percentage difference between the value with and without the voltmeter.
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