Physics
7th Edition
ISBN: 9780321625915
Author: Douglas C. Giancoli
Publisher: PEARSON
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Chapter 4, Problem 89GP
To determine
The minimum normal force the climber must exert.
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In the circuit shown below & = 66.0 V, R5
= 4.00, R3 = 2.00, R₂ = 2.20 ₪, I5 = 11.41 A, I₁ = 10.17 A, and i̟ = 6.88 A. Find the current through R2 and R3, and the values of the resistors R₁ and R. (Due to the nature of this
problem, do not use rounded intermediate values-including answers submitted in WebAssign-in your calculations.)
12
= 8.12
8.12
13
R₁₁ =
RA
=
A
Based on the known variables, which two junctions should you consider to find the current I3? A
6.9965
61.5123
Ω
Which loop will give you an equation with just R4 as the unknown? Did you follow the sign convention for the potential difference across each element in the loop?
R₁
www
11
R₂
www
R4
www
14
8
15
www
R5
www
R3
A car traveling at 42 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 53 cm (with respect to the road)
while being brought to rest by an inflated air bag. What magnitude of force (assumed constant) acts on the passenger's upper torso,
which has a mass of 43 kg?
Number i
Units
Three resistors R₁ = 88.1 Q, R2 = 19.9 £2, R3 = 70.00, and two batteries & ₁ = 40.0 V, and ε2 = 353 V are connected as shown in the diagram below.
R₁
www
E₁
E2
R₂
ww
ww
R3
(a) What current flows through R₁, R2, and R3?
11
= 0.454
Did you choose directions for each of the three currents? Given that you have three unknowns to solve for, how many equations, at the least, will you need? A
12
= 1.759
Did you choose directions for each of the three currents? Given that you have three unknowns to solve for, how many equations, at the least, will you need? A
13
2.213
=
Did you choose directions for each of the three currents? Given that you have three unknowns to solve for, how many equations, at the least, will you need? A
(b) What is the absolute value of the potential difference across R1, R2, and R3?
|AVR1 = 40.0
How is the potential difference related to the current and the resistance? V
|AVR2
= 35.0
How is the potential difference related to the current and the resistance? V
|AVR3
=…
Chapter 4 Solutions
Physics
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