In the previous problem, suppose the radial distance from the center of the platter to the location of the mass is increased Which statement below is true? The value of vimax) would be increased

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# Physics Questions on Rotational Motion and Friction

## Question 4
A mass m sits at a distance r from the center of a rough platter rotating with angular speed ω. Which of the following would result in increasing the maximum rotational velocity (Vfmax)=ω(max) times radius) at which the platter can rotate without the mass slipping?

- Increasing the mass itself
- Decreasing the mass
- Increasing the coefficient of static friction
- Decreasing the coefficient of static friction
- Two of the above
- NOTA

## Question 5
In the previous problem, suppose the radial distance from the center of the platter to the location of the mass is increased. Which statement below is true?

- The value of Vfmax would be increased
- The value of Vfmax would be decreased
- The static frictional force on the mass would increase (assuming ω is unchanged).
- The static frictional force on the mass would decrease (assuming ω is unchanged).
- Two of the above are true
- NOTA

## Question 6
A car (purple circle) is moving on a banked track; the graphical addition of forces acting on the car is shown in the accompanying figure. From the figure, which is true of the force of friction?

(There is no detailed description of the figure provided in the text.) 

### Note:
- Click Save and Submit to save and submit. Click Save All Answers to save all answers.

(Note: For a comprehensive understanding of the scenarios depicted in the questions, kindly refer to relevant diagrams and charts typically found in physics textbooks or online educational resources on rotational motion and friction.)
Transcribed Image Text:# Physics Questions on Rotational Motion and Friction ## Question 4 A mass m sits at a distance r from the center of a rough platter rotating with angular speed ω. Which of the following would result in increasing the maximum rotational velocity (Vfmax)=ω(max) times radius) at which the platter can rotate without the mass slipping? - Increasing the mass itself - Decreasing the mass - Increasing the coefficient of static friction - Decreasing the coefficient of static friction - Two of the above - NOTA ## Question 5 In the previous problem, suppose the radial distance from the center of the platter to the location of the mass is increased. Which statement below is true? - The value of Vfmax would be increased - The value of Vfmax would be decreased - The static frictional force on the mass would increase (assuming ω is unchanged). - The static frictional force on the mass would decrease (assuming ω is unchanged). - Two of the above are true - NOTA ## Question 6 A car (purple circle) is moving on a banked track; the graphical addition of forces acting on the car is shown in the accompanying figure. From the figure, which is true of the force of friction? (There is no detailed description of the figure provided in the text.) ### Note: - Click Save and Submit to save and submit. Click Save All Answers to save all answers. (Note: For a comprehensive understanding of the scenarios depicted in the questions, kindly refer to relevant diagrams and charts typically found in physics textbooks or online educational resources on rotational motion and friction.)
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