Conceptual: bug masses on a rotating wheel

AI Thread Summary
In the discussion, two objects of equal mass on a rotating wheel are analyzed regarding their motion and acceleration. It is established that mass 2, located closer to the axis, travels a shorter distance than mass 1 at the rim, confirming that statement one is true. However, the total acceleration of mass 1 is greater than that of mass 2, making statement two false. The angles covered by both masses are equal, but their angular velocities and accelerations differ, leading to statements four, five, and seven being false. The centripetal acceleration of mass 2 is indeed less than that of mass 1, validating statement six.
getty102
Messages
38
Reaction score
0

Homework Statement



Two objects of equal mass are on a turning wheel. Mass 1 is located at the rim of the wheel while mass 2 is located halfway between the rim and the axis of rotation. The wheel is rotating with a non-zero angular acceleration. For each of the following statements select the correct option to complete the statement.

Each of these statements have variables that are underlined

1. For a given time, mass 2 travels a distance that is less than the distance traveled by mass
2. The magnitude of the total acceleration of mass 1 is greater than the total acceleration of mass.
3. For a given time, the angle covered by mass 2 is equal to the angle covered by mass 1.
4. For a given time, the angle covered by mass 2 is equal to the angle covered by mass 1.
5. The angular acceleration of mass 2 is equal to the angular acceleration of mass 1
6. The centripetal (radial) acceleration of mass 2 is less than the centripetal acceleration of mass 1.
7. The tangential acceleration of mass 2 is equal to the tangential acceleration of mass 1.

Homework Equations



ac=v2/r
T=(2\pi)/ω

The Attempt at a Solution



I tried using the relevant equations to prove these statements but it didn't work. I'm not sure which statement is false, or if there's more than 1 wrong statement.
 
Physics news on Phys.org
Any help is appreciated! 1. For a given time, mass 2 travels a distance that is less than the distance traveled by mass 1. - True 2. The magnitude of the total acceleration of mass 1 is greater than the total acceleration of mass 2. - False 3. For a given time, the angle covered by mass 2 is equal to the angle covered by mass 1. - True 4. For a given time, the angular velocity of mass 2 is equal to the angular velocity of mass 1. - False 5. The angular acceleration of mass 2 is equal to the angular acceleration of mass 1. - False 6. The centripetal (radial) acceleration of mass 2 is less than the centripetal acceleration of mass 1. - True 7. The tangential acceleration of mass 2 is equal to the tangential acceleration of mass 1. - False
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Back
Top