Machines and Graphics Quiz | Machines and Graphics Objective Type Questions and Answers

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Questions
21 A disc of mass 4 kg, radius 0.5m and moment of inertia 3 kg-m2 rolls on a horizontal surface so that its center moves with speed 5 m/see. Kinetic energy of the disc is
A 50 J
B 150 J
C 200 J
D 400 J

Answer: 200 J
22 When a circular wheel rolls on a straight track, then the shape of body centrode and space centrode respectively are
A straight line and parabola
B straight line and circle
C circle and straight line
D circle and parabola

Answer: circle and straight line
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23 At the instantaneous center, the velocity of the moving lamina at any instant is
A Zero
B Maximum
C Minimum
D Varying

Answer: 464 J
24 For a given velocity of a projectile, the range is maximum when the angle of projection is
A 30°
B 45°
C 90°
D 0°

Answer: 45°
25 A stone is thrown vertically upwards with a vertical velocity of 49 m/sec. It returns to the ground in
A 5 sec
B 8 sec
C 10 sec
D 20 sec

Answer: 10 sec
26 If a projectile is fired with an initial velocity of 10 m/sec at an angle of 60° to the horizontal, its horizontal and vertical velocity at the highest point of trajectory are
A 0 and 5 m/sec
B 5 m/sec and 0
C 5 V3 m/sec and 0
D 5 and 5V3 m/sec

Answer: 5 m/sec and 0
27 In a simple harmonic motion, the position of equilibrium is always
A Stable
B Unstable
C Neutral
D None Of The Above

Answer: Stable
28 If A is the amplitude of particle executing simple harmonic motion, then the total energy E of the particle is
A proportional to A
B proportional to A2
C proportional to 1/A2
D independent of A

Answer: proportional to A2
29 A particle of mass 2 kg executes simple harmonic motion of frequency 6/71 Hz and amplitude 0.25 m. Its maximum kinetic energy is
A 4.5 J
B 9.0 J
C 12.0 J
D 18.0 J

Answer: 9.0 J
30 If the kinetic energy and potential energy of a simple harmonic oscillator of amplitude A are both equal to half the total energy, then the displacement is equal to
A A
B A/2
C A/V2
D AV2

Answer: A/V2
31 Time period and length of a seconds pendulum respectively are
A 1 sec and 99.4 cm
B 1 sec and 92.7 cm
C 2 sec and 99.4 cm
D 2 sec and 92.7 cm

Answer: 2 sec and 99.4 cm
32 A particle is executing simple harmonic motion in a line 1.0 m long. If the time of one complete vibration is 1 sec, then the maximum velocity of the particle is
A 1.00 m/sec
B 1.57 m/sec
C 3.14 m/sec
D 6.28 m/sec

Answer: 3.14 m/sec
33 One Newton is equivalent to
A 105 dyne
B 106 dyne
C 107 dyne
D 981 dyne

Answer: 105 dyne
34 The dimensions of Gravitational Universal constant 'G' are
A M-'L2r2
B M-'L3r2
C M-2L3T2
D M'L3T2

Answer: M-'L3r2
35 One Joule is equivalent to
A 9.81 Newton - metre
B 1 Newton - metre
C 1 kg wt - metre
D 1 dyne - metre

Answer: 1 Newton - metre
36 The unit of rotational inertia of a body in C.G.S system is
A cm4
B kg-cm2
C gm-cm2
D gm-cm3

Answer: gm-cm2
37 Impulse can be obtained from a
A force-displacement diagram
B force-time diagram
C velocity-time diagram
D velocity-displacement diagram

Answer: force-time diagram
38 A heavy ladder resting on floor and against a vertical wall may not be in equilibrium if
A floor is smooth and wall is rough
B floor is rough and wall is rough
C both floor and wall are rough
D both floor and wall are smooth

Answer: both floor and wall are smooth
39 Intrinisic equation of catenary is given by
A S = C tan q>
B S = C cos cp
C S = C sin cp
D S = C cot

Answer: S = C tan q>
40 Cartesian form of the equation of catenary is
A y = c cosh x/c
B y = c tan x/c
C y = c sin"1 x/c
D All above

Answer: y = c sinh x/c
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