-2<\/sup>]<\/p>\nQuestion 2.
\nWhen does the circular motion become uniform?
\nAnswer:
\nThe circular motion of bodies will be uniform, for uniform speed of particles.<\/p>\n
Question 3.
\nWhat is the amount of work done by the gravitational force on the body moving on the horizontal plane?
\nAnswer:
\nZero<\/p>\n
Question 4.
\nWhat is elastic collision?
\nAnswer:
\nA collision in which linear momentum and kinetic energy of the interacting system are conserved, is known as an elastic collision.<\/p>\n
<\/p>\n
Question 5.
\nGive one example for elastomers.
\nAnswer:
\nRubber<\/p>\n
Question 6.
\nWhat is thermal stress?
\nAnswer:
\nWhen thermal expansion is not allowed in a solid, the corresponding stress developed in it is known as thermal stress. The solid acquires a compressive strain due to the external forces, provided by (say) the rigid support at one end of it.<\/p>\n
Question 7.
\nDefine mean free path of the molecule in the gas.
\nAnswer:
\nThe average distance traveled by the molecule during two consecutive collisions is called mean free path.<\/p>\n
Question 8.
\nWhere does Kinetic energy of the oscillating particle become maximum?
\nAnswer:
\nThe K.E of oscillating particle becomes maximum when it reaches the mean position.<\/p>\n
Question 9.
\nWhat is resonance?
\nAnswer:
\nIf the frequency of forced oscillation of a system is the same as the natural frequency of the system which induces oscillation in the other, then both the systems are said to be in resonance.<\/p>\n
<\/p>\n
Question 10.
\nGive the value of phase difference between the particles of adjacent loop of stationary wave.
\nAnswer:
\n\u03a6 = 180\u00b0<\/p>\n
Part – B<\/span><\/p>\nII. Answer any five of the following questions:\u00a0 ( 5 x 2 = 10 )<\/span><\/p>\nQuestion 11.
\nName any two fundamental forces of nature.
\nAnswer:<\/p>\n