Friction: Bottom Most Point
Trending Questions
Q.
What is the condition for pure rolling?
Q. A rigid body of mass m and radius R rolls without slipping on a rough surface. A force is acting on the rigid body at distance x from the centre as shown in figure. Find the value of x so that static friction will be zero.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/942343/original_Q4.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/942343/original_Q4.png)
- Icm2mR
- 2IcmmR
- IcmmR
- 2Icm3mR
Q. A rigid body of mass m and radius R rolls without slipping on a rough surface. A force is acting on the rigid body at distance x from the centre as shown in figure. Find the value of x so that static friction will be zero.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/942343/original_Q4.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/942343/original_Q4.png)
- Icm2mR
- 2IcmmR
- IcmmR
- 2Icm3mR
Q. A round shaped body is released on an inclined plane. Friction is sufficient for pure rolling, mass of body is m & it is released from a height "h". Then which of the following is correct?
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/473594/original_Q22.png)
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/473594/original_Q22.png)
- Work done by friction is negative
- At bottom total weight is less than mgh
- Total K.E. on the ground is mgh & ratio of KEtrans & KErotative depends upon shape of the body
- None of the above
Q. When a body rolls without sliding, up an inclined plane, the frictional force is
- Directed up the plane
- Directed down the plane
- Zero
- Dependent on its velocity
Q. A body of mass m and radius R is rotating with angular velocity ω as shown in figure and kept on a surface that has sufficient friction. Then, the body will move:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/935159/original_original_10.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/935159/original_original_10.png)
- initially in backward direction, then along forward direction
- initially in forward direction, then along backward direction
- will always move along forward direction.
- none of these
Q. As shown in figure, a uniform disc of mass m is rolling without slipping with an angular velocity ω. The portion AB is rough and BC is smooth. If the disc crosses point B, the motion of the disc will be:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/931486/original_8.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/931486/original_8.png)
- translational motion only
- pure rolling motion
- rotational motion only
- none of these
Q. A body of mass m and radius R is rotating with angular velocity ω as shown in figure and kept on a surface that has sufficient friction. Then, the body will move:
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/935159/original_original_10.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/935159/original_original_10.png)
- initially in backward direction, then along forward direction
- initially in forward direction, then along backward direction
- will always move along forward direction.
- none of these