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Why is one end of drawing board pin broad and flat, whereas its other end is pointed and sharp?

Two block A and B of mass M & 3M are connected through a light string. One end of the string is connected to the blcok B and its other end is connected to a fixed point S as shown in fig. Now a force F is applied to block B. find the acceleration of block A & B.

A small particle of mass m moving inside a heavy, hollow and straight tube along the tube axis undergoes elastic collision at two ends. The tube has no friction and it is closed at one end by a flat surface while the other end is fitted with a heavy movable flat piston as shown in figure. When the distance of the piston from closed end is L = L_0 the particle speed is v = v_0 The piston is moved inward at a very low speed V such that V

"A mass is attached to one end of a spring and by holding the other end in hand, the spring is whirled in a horizontal circle" What happens to the length of the spring ?

On heating one end of a piece of a metal, the other end becomes hot because of

The ends of a metre stick are maintain at 100^(@)C and 0^(@)C . One end of a rod is maintained 25^(@)C . Where should its other end be touched on the metre stick so that there is no heat current in the rod in steady state?

A rod of length I leans by its upper end against a smooth vertical wall, while its other end leans against the floor. The end that leans against the wall moves uniformly downward. Then:

Two particles of mass m each are attached to a light rod of length d, one at its centre and the other at a free end, The rod is fixed at the other end and is rotated in a plane at an angular speed omega . Calculate the angular momentum of the particle at the end with respect to the particle at the centre

A half ring of mass m, radius R is hanged at its one end its one end in verical plane and if free to socilalte in its plane. Find oscillations frequency of the half ring.

The locus of the centre of the circle for which one end of the diameter is (3,3) while the other end lies on the line x+y=4 is

A radius of a circle is a line segment with one end point at..... and the other end-point on .....