Homework rotation 1.) You spin a bicycle wheel (diameter of 0.85 m, mass of 4.5
ID: 1794229 • Letter: H
Question
Homework rotation 1.) You spin a bicycle wheel (diameter of 0.85 m, mass of 4.5 kg). applying a force of 24 N tangentially. What is the torque on the wheel about an axis goes through the center of the wheel? 2The drain plug on a car's engine has been tightened to a torque of 0.025 Nm. If a 0.15 m long wrench is used, what is the minimum force required to apply on the wrench? 3. Two children are sitting on opposite sides of a uniform seesaw pivoted at the center. If 35 kg child is 2m from the pivot point, how far from the pivot point will her friend of mass 30 kg have to sit on the other side of the seesaw to be in equilibrium? 4 A uniform meter stick pivoted at its center. A 100 g mass is suspended at 25 cm mark. At what position should a 150 g mass be suspended to put the system in equilibrium?( 66.7 m) What mass would have to be suspended at the 90 cm mark for the system to be in equilibrium?Explanation / Answer
1.
Torque = r*F
Using given values
Torque = (0.85/2)*24 = 10.2 N.m
2.
Torque = r*F
F = torque/r
F = 0.025/0.15
F = 0.167 N
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