Question

22. A wheel, orginally rotating at 125 rad/s undergoes a constant angular deceleration of 5.00 rad/s^2. What is its angular speed after it has turned through an angle of 522 radians?

19. When you are out for a shopping, you noticed that the digitial sign outside the shopping center reports that the temperature is 43•C. What is the temperature in degrees Fahrenheit ?

16. A 77 -N •m torque acts on a wheel with a moment if inertia 175 kg • m^2. If the wheel starts from rest, how many seconds will it take the wheel to make one revolution ?

12. At standard temperature and pressure, carbon dioxide has a density of 1.98 kg/m^3. What volume (in m^3) does 15.55 kg of carbon dioxide occupy at standard temperature and pressure ?

9. A wheel with a 0.10-m radius is rotating at 35 rev/s. It then slows uniformly to 15 rev/s over 3.32 s interval. what is the angular acceleration of a point on the wheel ?

Answer 1

initial angular speed w = 125 rad / s

Angular deceleration α = - 5 rad / s ^ 2

angular displacement θ = 522 rad

from the relation w ' ²- w ² = 2αθ

angular speed after it has turned through an angle of 628radians is w ' = √[ w ² + 2αθ]

                                                                                                          = 102 rad / s

19)

Equation:
F = (9/5)(C) + 32

F = (9/5)(43) + 32
F = 109.4 degrees

16)

12)

9)