1.A stone is thrown up a slope of inclination 60� to the horizontal. At what angle to the slope must the stone be thrown so as to land as far as possible from the point of projection ?

2.When a circular wheel rolls on a straight track, then the shape of body centrode and space centrode respectively are

3.If A is the amplitude of particle executing simple harmonic motion, then the total energy E of the particle is

4.The angle of projection at which the horizontal range and maximum height of a projectile are equal to

5.A flywheel of moment of inertia 20 kg-m" is acted upon by a tangential force of 5 N at 2 m from its axis, for 3 seconds. The increase in angular velocity in radian persecond is