A particel slides from rest from the topmost point of a vertical circle of radirs `r` along a smooth chord making an angle `theta` with the vertical. The time of descent is .

A glass marble slides from rest from the topmost point of a vertical circle of radius r along a smooth chord. Does the time of descent depend upon the chord chosen ?

A conical pendulum of length L makes an angle theta with the vertical. The time period will be

A conical pendulum of length L makes an angle theta with the vertical. The time period will be

The value of the escape velocity of a body thrown vertically upwards from the surface of the earth is v. if the body is thrown making an angle theta with the vertical, then the value of the escape velocity will be

PQ is a smooth inclined plane whose angle theta can be varied in such a way that point Q remains fixed and P can move on a vertical line PR . A particle slides from rest from point P at different value of theta time for descent from P and Q is noted. The following statement (s) is // are correct about the time of descent : A. the minimum time of descent is 2sqrt(l//g) B. the time descent is minimum continuously as theta is increased C. the time of descent decreases continuously as theta is increased D. the time of descent first decreases then increases.

PQ is a smooth inclined plane whose angle theta can be varied in such a way that point Q remains fixed and P can move on a vertical line PR . A particle slides from rest from point P at different value of theta time for descent from P and Q is noted. The following statement (s) is // are correct about the time of descent :

A simple pendulum is released from rest with the string in horizontal position. The vertical component of the velocity of the bob becomes maximum, when the string makes an angle theta with the vertical. The angle theta is equal to

A simple pendulum is released from rest with the string in horizontal position. The vertical component of the velocity of the bob becomes maximum, when the string makes an angle theta with the vertical. The angle theta is equal to