One end of a spring is kept fixed while the other end is stretched by a force as shown in the diagram.

Name one instrument which works on the above principle.

One end of a spring is kept fixed while the other end is stretched by a force as shown in the diagram. Copy the diagram and mark on it the direction of the restoring force.

Name any one instrument which works on the principle of Tangent law in magnetism.

One end of a light spring of spring constant k is fixed to a wall and the other end is tied to a block placed on a smooth horizontal surface. In a displacement, the work by the spring is 1/2kx^2 . The possible cases are

One end of a light spring of spring constant k is fixed to a wall and the other end is tied to a block placed on a smooth horizontal surface. In a displacment, the work done by the spring is +(1/2)kx^(2) . The possible cases are.

One end of a light spring of spring constant k is fixed to a wall and the other end is tied to a block placed on a smooth horizontal surface. In a displacement, the work done by the spring is +(1/2)kx^(2) . The possible cases are.

A bead of mass m can slide without friction on a fixed circular horizontal ring of radius 3R having a centre at the point C. The bead is attached to one of the ends of spring of spring constant k. Natural length of spring is R and the other end of the spring is R and the other end of the spring is fixed at point O as shown in the figure. If the bead is released from position A, then the kinetic energy of the bead when it reaches point B is

Two light spring of force constants k_(1) and k_(2) and a block of mass m are in the line AB on a smooth horizontal table such that one end of each spring is fixed on right supports and the other end is free as shown in figure The distance CD between the free ends of the spring is 60 cm . If the block (k_(1) = 1.8 N//m, k_(2) = 3.2 N//m and m = 200g) . Is the motion simple harmonic?

A particle of mass 'm' is attached to one end of a string of length 'l' while the other end is fixed to a point 'h' above the horizontal table, the particle is made to revolve in a circle on the table, so as to make P revolution per sec. The maximum value of P if the particle is to be contact with the table is

A wire fixed at the upper end stretches by length l by applying a force F. The work done in stretching is

The diagram below shows a magnetic needle kept just below the conductor AB which is kept in North South direction. Name one device which works on this principle.