Saved Bookmarks
| 1. |
The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:1. work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket.2. work done by gravitational force in the above case.3. work done by friction on a body sliding down an inclined plane.4. work done by an applied force on a body moving on a rough horizontal plane with uniform velocity.5. work done by the resistive force of air on vibrating pendulum in bringing it to rest. |
|
Answer» 1. +ve 2. -ve 3. -ve 4. +ve 5. -ve |
|