Abicycle wheel has a diameter of 63.2 cm and a mass of 1.89 kg. assume that the wheel is a hoop with all of the mass concentrated on the outside radius. the bicycle is placed on a stationary stand and a resistive force of 123 n is applied tangent to the rim of the tire. (a) what force must be applied by a chain passing over a 9.02-cm-diameter sprocket in order to give the wheel an acceleration of 4.43 rad/s? 880.35 (b) what force is required if you shift to a 5.62-cm-diameter sprocket? 1412.95x your response is off by a multiple of ten.

b

explanation:

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day