Cut a right angled triangle, stick a string along its perpendicular side, as shown in fig. (i) hold the both the sides of a string with your hands and rotate it with constant speed.
What fo you observe?

A bob of mass m is attached at one end of a string of length l other end of the string is fixed at point O . Bob is rotating in a circular path of radius l in horizontal plane about O with constant speed v , as shown in the figure. The average force exterted by string on the bob during its :- (A) half revolution will be (mv^(2))/(pil) (B) half revolution will be (2mv^(2))/(pil) (C) one fourth revolution will be (sqrt2mv^(2))/(pil) (D) one revolution will be zero Select correct alternative :-

Now draw a triangle ABC and measure its sides. Find the sum of the sides AB + BC, BC + AC and AC + AB, compare it with the length of the third side. What do you observe? You will observe that AB + BC > AC, BC + AC > AB and AC + AB > BC.

Consider a disc rotating in the horizontal plane with a constant angular speed omega about its centre O . The disc has a shaded region on one side of the diameter and an unshaded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles P and Q are simultaneously projected at an angle towards R. The velocity of projection is in the y-z plane and is same for both pebbles with respect to the disc. Assume that (i) they land back on the disc before the disc has completed (1)/(8) rotation, (ii) their range is less than half the disc radius, and (iii) w remains constant throughout. Then

The hypotenuse of a right angled triangle has its ends at the points (1,3) and (-4,1) . Find an equation of the legs (perpendicular sides) of the triangle.

(a) A box of weight 10sqrt(3) N is held n equilibrium with the help of two strings OA and OB as shown in figure-1. the string OA is horizontal. Find the tensions in both the stings. (b) If you can change location of the point A on the wall and hence the orientation of the string OA without altering the orientation of the string OB as shown in figure-II. what angle should the string OA make with the wall so that a minimum tension is developed in it?

Envied by the popularity of Pythagoras his disciple claimed a different relation between the sides of right angle triangles. By observing this what do you notice?

Your subject teacher arranged a potted plant as shown in figure (a). Next day turn its position horizontally as shown in figure (b). After few days, you observed the plant as shown in figure (c). What happens when the pot along with the plant is placed as in fig. (b)?