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NDA GK Previous Papers Chapterwise MCQs - Mechanics
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NDA GK Previous Papers Chapterwise MCQs - Mechanics
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25 Questions

1. A pendulum beats, faster than a standard pendulum. In order to bring it to the standard beat, the length of th pendulum is to be
2. Why is it difficult to measure the coefficient of expansion of a liquid than solid?
3.
A bullet of mass 20 gm is fired in the horizontal direction with a velocity 150 m/s from a pistol of mass 1 kg. Recoil velocity of the pistol is
4. In the relation a = bt + l, a and l are measured in meter (m) and t is measured in second (s). The SI unit of b must be
5. A force F is applied on a body (which moves on a straight line) for a duration of 3 s. The momentum of the body changes from 10 g cm/s to 40 g cm/s. The magnitude of the force F is
6. If some object is weighed when submerged in water, what will happen to its weight compared to its weight in air?
7. The plot given above represents displacement 'x' of a particle with time 't'. The particle is
8. An object of mass 5 kg is attached to the end of a rope. If the rope is pulled upward with an acceleration 0.30 ms–2, what is the tension in the rope?
9. A bus moving at a speed of 24m/s begins to slow at a rate of 3 m/s each second. How far does it go before stopping?
10. Which one among the following is the correct value of the gravitational force of the Earth acting on a body of mass 1 kg?
11. If a light body and a heavy body have equal momentum, then
12. A bullet is fired vertically up from a 400 m tall tower with a speed 80 m/s. If g is taken as 10 m/s2, the time taken by the bullet to reach the ground will be
13. Power required by a boy of mass 30 kg to run up a staircase of 40 steps in 10 seconds is (Height of each step is 15 cm) (Take g = 10 m/s2)
14. Bernoulli's principle is based on which one among the following laws?
15. A jet engine works on the principle of conservation of
16. A particle is moving with uniform acceleration along a straight line ABC, where AB = BC. The average velocity of the particle from A to B is 10 m/s and from B to C is 15 m/s. The average velocity for the whole journey from A to C in m/s is
17. When a mass m is hung on a spring, the spring stretched by 6 cm. If the loaded spring is pulled downward a little and released, then the period of vibration of the system will be
18.
A block of mass 2 m is pulled along a horizontal frictionless surface by a rope of mass m as shown in the figure given above. What force is exerted by the rope on the block ?
19. Two teams are pulling a rope with equal and opposite forces each of 5 kN in a tug of war so that a condition of equilibrium exists. What will be the tensile force in the rope?
20. An object moves in a circular path with a constant speed. Which one of the following statements is correct?
21. A motor vehicle is moving on a circle with a uniform speed. The net acceleration of the vehicle is
22.
Which one of the following physical quantity has the same unit as that of pressure?"
23. For a particle revolving in a circular path, the acceleration of the particle is
24. Which one of the following has maximum inertia?
25. The time period of a simple pendulum made using a thin copper wire of length L is T. Suppose the temperature of the room in which this simple pendulum is placed increases by 30°C, what will be the effect on the time period of the pendulum?

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