2(i) A body starts from rest and moves with constant acceleration
of 10 m/s2.How much distance will it travel in the 4th
second of its motion?
(ii) An
astronomical telescope having angular magnification 5 consists of two thin
lenses 24 cm apart. Find the power of its lenses.
(v) 271 fringes
passed through a reference point when a movable mirror of Michelson interferometer
is moved by 0.08mm.Find the wavelength used in A0.
(vi) How many
times in a second does a spaceship of diameter 30 m, needed to be rotated in
order to create artificial gravity?
(vii) A mass at
the end of spring oscillates with a period of 0.4 sec. Find the acceleration
when the displacement is 6 cm.
(ix) A uniform
ladder having length “L” and weighing 50N rests against a smooth vertical wall.
If the co efficient of friction between ladder and ground is 0.4, find the
minimum angle such that the ladder may not slip.
(xii) A
diffraction grating produces 3rd order spectrum of light of
wavelength 7000 Ao at an angle of 30o from the normal.
What is the grating element? Calculate the number of lines per cm.
(xiii)Two
vectors A and B are such that |A|=4, |B|=6 and A.B=13.5.Find the magnitude of
difference of vectors and angle between A and B.
(xiv) A string
2m long and mass 0.004 kg, is stretched horizontally by passing one end over a
pulley and attaching a 1 kg mass to it. Find the speed of the transverse waves
on the string and frequency of the second harmonic.
(xv) A 50 g
bullet is fired into 10 kg wooden block that is suspended by a long cord so
that it can swing as a pendulum. If the block is displaced as that its centre
of gravity rises by 10 cm. What is the speed of the bullet?
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