35) A 2 m long ladder rests against a wall and makes an angle of 30° with the horizontal floor. Where will be the instantaneous center of rotation when the ladder starts slipping ?i) 1.0 in from the wallii)1.732 m from the walliii) 1.0 m above the flooriv) 1.732 m above the floor The correct answer is

36) For a given velocity of a projectile, the range is maximum when the angle of projection is

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

38) The maximum value of the horizontal range for a projectile projected with a velocity of 98 m/sec is

39) A stone is thrown vertically upwards with a vertical velocity of 49 m/sec. It returns to the ground in