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| 1. |
A body of mass `m` is moving along a circular path of radius `R` such that its kinetic energy at any instant is `k=k_(0)((t)/(t_(0)))^(2)` where `t_(0)` is an appropriate constant. ThenA. The magnitude of tangential component of force acting on it must be constant.B. The magnitude of centripetal force acting on the body will be directly proportional to `t^(2)`.C. After a long time, the resultant force will make a very small angle with the radius.D. The magnitude of centripetal force acting on the body will be directly proportional to `t`. |
| Answer» Use `F_(t)=m(dv)/(dt)` and `F_(t)=(mv^(2))/(r )` | |