Q33 of 48 Page 45

A bob of mass m suspended by a light string of length L is whirled into a vertical circle as shown in Fig. 6.11. What will be the trajectory of the particle if the string is cut at

(a) Point B?


(b) Point C?


(c) Point X?



(a) Vertically downward as the tangential velocity at the point B will be vertically downwards

(b) Parabolic path with vertex at C as the tangential velocity will be in the horizontal direction but due to downward gravitational force it will follow parabolic path


(c)It will also be a parabolic path with vertex at x, due to the tangential velocity and the gravitational force


More from this chapter

All 48 →
31

Give example of a situation in which an applied force does not result in a change in kinetic energy.

 32

Two bodies of unequal mass are moving in the same direction with equal kinetic energy. The two bodies are brought to rest by applying retarding force of same magnitude. How would the distance moved by them before coming to rest compare?

 34

A graph of potential energy V (x) verses x is shown in Fig. 6.12. A particle of energy E0 is executing motion in it. Draw graph of velocity and kinetic energy versus x for one complete cycle AFA.


 35

A ball of mass m, moving with a speed 2v0, collides inelastically (e > 0) with an identical ball at rest. Show that

(a) For head-on collision, both the balls move forward.


(b) For a general collision, the angle between the two velocities of scattered balls is less than 90°.