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MCQs 1: A stone is thrown vertically upwards with a vertical velocity of 49 m/sec. It returns to the ground in________________?

5 sec 8 sec 10 sec 20 sec
Answer Explanation

MCQs 2: If the direction of projection bisects the angle between the vertical and the inclined plane, then the range of projectile on the inclined plane is__________________?

zero maximum minimum unpredictable
Answer Explanation

MCQs 3: The angle of projection at which the horizontal range and maximum height of a projectile are equal to___________________?

45° tan-1 (2) tan-‘ (4) tan”1 (1/4)
Answer Explanation

MCQs 4: In a simple harmonic motion, the position of equilibrium is always_________________?

stable unstable neutral none of the above
Answer Explanation

MCQs 5: The time period of a simple pendulum depends on__________________?
1) mass of suspended particle
2) length of the pendulum
3) acceleration due to gravity
The correct answer is

only (1) both (2) and (3) both (1) and (3) all are correct
Answer Explanation

MCQs 6: The maximum displacement of a particle executing S.H.M. corresponds to__________________?

zero potential energy and maximum kinetic energy zero kinetic energy and maximum potential energy maximum kinetic energy and maxi-mum potential energy minimum kinetic energy and minimum potential energy
Answer Explanation

MCQs 7: A simple pendulum of length 1 has an energy E when its amplitude is A. If its amplitude is increased to 2 A, the energy becomes____________________?

E E/2 2E 4E
Answer Explanation

MCQs 8: The ratio of kinetic energy and potential energy of a simple harmonic oscillator, at a displacement equal to half its amplitude is given by__________________?

1:2 1:1 2:1 3:1
Answer Explanation

MCQs 9: Time period and length of a seconds pendulum respectively are_________________?

1 sec and 99.4 cm 1 sec and 92.7 cm 2 sec and 99.4 cm 2 sec and 92.7 cm
Answer Explanation

MCQs 10: 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___________________?

1.00 m/sec 1.57 m/sec 3.14 m/sec 6.28 m/sec
Answer Explanation

MCQs 11: Joule is the unit of__________________?

power impulse work momentum
Answer Explanation

MCQs 12: A quantity whose dimensions are M2L2 T3 could be the product of_________________?

force and pressure mass and power energy and velocity force and velocity
Answer Explanation

MCQs 13: If y is force and x is velocity, then dimensions of —=r are dx2__________________?

M’^T’ M’L-‘T0 M’L-‘T1 M2L’T3
Answer Explanation

MCQs 14: The dimensions of centrifugal force are__________________?

M1 L2 T2 M’L’T1 M’L’T2 M’L-‘T2
Answer Explanation

MCQs 15: The unit of rotational inertia of a body in C.G.S system is________________?

cm4 kg-cm2 gm-cm2 gm-cm3
Answer Explanation

MCQs 16: In SI units, the units of force and energy are respectively___________________?

Newton and watt Dyne and erg Newton and joule kg-wt and joule
Answer Explanation

MCQs 17: A cable loaded with 10 kN/m of span is stretched between supports in the same horizontal line 100 m apart. If the central dip is 10 m, then the maximum and minimum pull in the cable respectively are____________________?

1346.3 kN and 1500 kN 1436.2 kN and 1250 kN 1346.3 kN and 1250 kN 1436.2 kN and 1500 kN
Answer Explanation

MCQs 18: Impulse can be obtained from a_________________?

force-displacement diagram force-time diagram velocity-time diagram velocity-displacement diagram
Answer Explanation

MCQs 19: Which of the following is a scalar quantity ?

energy momentum torque impulse
Answer Explanation

MCQs 20: Coefficient of friction depends on__________________?

nature of surfaces only area of contact only both (A) and (B) none of the above
Answer Explanation

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