When air resistance is taken into account while dealing with the motion of the projectile, to achieve maximum horizontal range, the angle of projection should be,

The maximum height attained by projectile is found to be equal to 0.433 of the horizontal range. The angle of projection of this projectile is

A projectile is thrown with an initial velocity of 50 m/s. The maximum horizontal distance which this projectile can travel is

A jet airplane travelling at the speed of 500 $km{h}^{-1}kmh^\{-1\}$ ejects the burnt gases at the speed of 1400 $km{h}^{-1}kmh^\{-1\}$ relative to the jet airplane. The speed of burnt gases relative to stationary observer on the earth is

A projectile projected with certain angle reaches ground with

The time period of conical pendulum is _____

A projectile projected with certain velocity reaches ground with (magnitude)

The period of a conical pendulum in terms of its length (l), semivertical angle ($\theta \backslash theta$) and acceleration due to gravity (g) is:

Consider a simple pendulum of length 1 m. Its bob performs a circular motion in horizontal plane with its string making an angle $60^{\circ }60^\backslash circ$ with the vertical. The period of rotation of the bob is(Take g = 10 $m\mathrm{/}{s}^{2}m/s^2$ )

The period of a conical pendulum is