NEET INTRODUCTORY TEST SERIES 2 PHYSICS -

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1. A ring of mass m and radius R has four particles attached to the ring as shown in the figure. The centre of the ring is at origin. Find the CM of the system.

(a) (0, R)
(b) (R, 0)
(c) (0,0)
(d) (R√2, 0)

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3. Three identical spheres, each of mass 1 kg are placed touching each other with their centres on a straight line. Their centre are marked P, Q and R The distance of centre of mass of the system from P is

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5. The centre of mass of three bodies each of mass 1 kg located at the points (0, 0), (3, 0) and (0, 4) in the XY plane is

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6. The maximum velocity of a particle executing simple harmonic motion with an amplitude of 7 mm is 4.4 m s^-1 .The period of oscillation is

(a) 100 s
(b) 0.01 s
(c) 10 s
(d) 0.1 s

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9. A particle executes linear simple harmonic motion with an amplitude of 2 cm. When the particle is at a distance of 1 cm from the mean position, the magnitude of its velocity is equal to that of its acceleration. Then, its time period in second is

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10. There is a simple pendulum hanging from the ceiling of lift. When the lift is standing still, the time period of pendulum is T. If the resultant acceleration becomes g/4, then the new time period of the pendulum is

(a) 0.8 T
(b) 0.25 T
(c) 2 T
(d) 4T

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12. A body starts from rest from the origin with an acceleration of 3 m/s² along the -axis and 4 m/s² along the -axis. Its distance from the origin after 2 will be

(a) 5 m
(b) 10 m
(c) 15 m
(d) 20 m

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13. particle moving with a velocity equal to 0.4 m/s is subjected to an acceleration of 15 m/s² for 2 in a direction at the right angle to its direction of motion. The resultant velocity is

(a) 0.7 m/s
(b) 0.5 m/s
(c) 0.1 m/s
(d) 0.7 – 0.1 m/s

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14. A woman presses against a wall with a force of 10 N for 10 min. The work she does is

(a) 0
(b) 200 J
(c) 1224 J
(d) 12 kJ

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15. Which of the following units is the unit for measuring work done?

(a) Joule
(b) Watt
(c) Newton
(d) Volt

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16. A box of mass 2 kg is moving at a constant speed of 3 m s^-1 What is the kinetic energy of the box?

(a) 2 J
(b) 3 J
(c) 9 J
(d) 18 J

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17. A 50 kg mass has a P.E. of 4.9 kJ relative to the ground. The height of the mass above the ground is

(a) 10 m
(b) 98 m
(c) 960 m
(d) 245 km

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18. A 1000 kg motor car travels at a constant speed of 30 m s^-1 along a road with a frictional force of 100 N. What is the power generated by the motorcar? (g = 10 m s¯²)

(a) 3000 W
(b) 4500 W
(c) 300 000 W
(d) 450 000 W

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19. A spring 40 mm long is stretched by the application of a force. If 10 N force required to stretch the spring through 1 mm, then work done in stretching the spring through 40 mm is

(a) 84 J
(b) 68 J
(c) 23 J
(d) 8J

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20. Natural length of a spring is 60 cm, and its spring constant is 4000 N/m. A mass of 20 kg is hung from it. The extension produced in the spring is, (Take g = 9.8 m/s²)

(a) 4.9 cm
(b) 0.49 cm
(c) 9.4 cm
(d) 0.94 cm

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NEET INTRODUCTORY TEST SERIES 2 PHYSICS

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