Physics chapter 5 – QBank L2
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Question 1 of 45
1. Question
Which of the following factor balances the weight of an aeroplane flying in the air?
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Question 2 of 45
2. Question
Why a rider on a horse back falls, as horse starts running all of a sudden?
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Question 3 of 45
3. Question
Statement 1: The acceleration produced by a force in the motion of a body depends only on its mass
Statement 2: Larger is the mass of the body, lesser will be the acceleration produced
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Question 4 of 45
4. Question
Two masses of 4 kg and 5 kg are connected by a string passing through a frictionless pulley and are kept on a frictionless table as shown in the figure. Then what is the acceleration of 5 kg mass?
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Question 5 of 45
5. Question
What will be the apparent weight of the body, if it is travelling upwards with an acceleration of \(2 m/s^{2}\) and mass 10 kg?
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Question 6 of 45
6. Question
A force of 50 dynes is acted on a body of mass 5 g which is at rest for an interval of 3 seconds, then calculate the impulse.
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Question 7 of 45
7. Question
Rocket propulsion is associated with
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Question 8 of 45
8. Question
The mass of a body measured by a physical balance in a lift at rest is found to be ‘m’. If the lift is going up with an acceleration ‘a’, then determine its mass.
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Question 9 of 45
9. Question
Complete the sentence: A body is said to be in equilibrium if all the forces acting on it
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Question 10 of 45
10. Question
State the principle on which a jet engine works.
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Question 11 of 45
11. Question
A stick of 1 m is moving with velocity of \(2.7 \times 10^{8} ms^{1}\). Find the apparent length of the stick, \((c = 3 \times 10^{8} ms^{1})\)
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Question 12 of 45
12. Question
Statement 1: To move a body uniformly along a circle, force is required.
Statement 2: The acceleration is zero when the motion is uniform.CorrectIncorrect 
Question 13 of 45
13. Question
A body of mass 0.25 kg is projected with muzzle velocity \(100 ms^{1}\) from a tank of mass 100 kg. Then evaluate the recoil velocity of the tank.
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Question 14 of 45
14. Question
Three equal weights A. B and C of mass 2 kg each are hanging on a string passing over a fixed frictionless pulley as shown in the figure Find the tension in the string connecting weights B and C.
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Question 15 of 45
15. Question
A block of mass 5 kg is moving horizontally at a speed of 1.5 m/s. A perpendicular force of 5N acts on it for 4 seconds. Find the distance of the block from the point where the force started acting.
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Question 16 of 45
16. Question
A train is moving with velocity 20 m/s, on this dust is falling at the rate of 50 kg/minute. With constant velocity’ the extra force required to move this train will be:
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Question 17 of 45
17. Question
Two ice skaters A and B approach each other at right angles. Skater A has a mass 30 kg and velocity 1 m/s and skater B has a mass 20 kg and velocity 2 m/s. They meet and cling together. What is the final velocity of the couple?
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Question 18 of 45
18. Question
Statement 1: To remain in any state a force is required by the body.
Statement 2: Acceleration has a finite value in uniform linear motion.
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Question 19 of 45
19. Question
If a body of mass ‘m’ is carried by a lift moving with an upward acceleration ’a’, then the forces acting on the body are (i) the reaction ‘R’ on the floor of the lift upwards (ii) the weight ‘mg’ of the body acting vertically downwards. Then determine the equation of motion.
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Question 20 of 45
20. Question
A person sitting on the topmost berth in the compartment of a train which is just going to stop on a railway station, drops an apple aiming at the open hand of his brother sitting vertically below his hands at a distance of about 2 meter. Determine the situation of the apple fall.
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Question 21 of 45
21. Question
Statement 1: If surfaces in contact are too smooth, then the force of friction increases.
Statement 2: Friction is decreased by smoothnessCorrectIncorrect 
Question 22 of 45
22. Question
Masses M and m are connected by a weightless string as shown in figure They are pulled by a force F on a frictionless horizontal surface. Then what will be the tension in the string?
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Question 23 of 45
23. Question
The linear momentum ‘p’ of a body moving in 1dimension varies with time according to the equation \(p = a + bt^{2}\), where a and b are positive constants. Determine the relation of net force acting on the body with time.
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Question 24 of 45
24. Question
A body of mass 2 kg is hung on a spring balance mounted vertically in a lift. When the lift descends with an acceleration equal to the acceleration due to gravity ‘g’, the spring balance is zero Now suppose the lift moves up with a constant velocity of 2 m/s, then find the reading on the balance
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Question 25 of 45
25. Question
A rocket having mass of 100 kg is going up vertically at a certain instance of time. At a speed of 400 m/s, if it is ejecting 5 kg of gas per second, then what would be the acceleration of the rocket? \((taking g = 10 m/s^{2})\)
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Question 26 of 45
26. Question
A false balance has equal arms. An object weigh X when placed in one pan and Y when placed in other pan. then what is the weight W of the object?
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Question 27 of 45
27. Question
Statement 1: A bullet is fired from a rifle. The kinetic energy of rifle is more than that of the bullet, if the rifle recoils freely. Statement 2: The law of conservation of momentum violates in case of rifle bullet system.
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Question 28 of 45
28. Question
A mass is hanging on a spring balance which is kept in a lift. The lift ascends Then the spring balance show in its reading.
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Question 29 of 45
29. Question
A ladder rests against a frictionless vertical wall, with its upper end 6 m above the ground and the lower end 4 m away from the wall. If the weight of the ladder is 500 N and its C. G. is at 1 /3rd distance from the lower end. then what will be the wall’s reaction (in Newton)?
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Question 30 of 45
30. Question
A man is standing on a balance and his weight is measured. What will happen to his weight, if he takes a step in the left side?
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Question 31 of 45
31. Question
Statement 1: If the net external force on the body is zero, then the acceleration of the body is zero
Statement 2: The acceleration is independent of force.CorrectIncorrect 
Question 32 of 45
32. Question
The figure is the part of a horizontally stretched net. If section AB is stretched with a force of 10 N, then find the tensions in the sections BC and BF.
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Question 33 of 45
33. Question
Following figure shows two masses M and M/2 are joint together by means of a light inextensible string passes over a frictionless pulley. If bigger mass is released, then the small one will ascend with an acceleration equal to:
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Question 34 of 45
34. Question
Statement 1: More force is applied by a horse to start a cart than to keep it moving. Statement 2: Static friction is greater than dynamic friction.
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Question 35 of 45
35. Question
What is the resultant, if the speed of a moving body is doubled?
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Question 36 of 45
36. Question
A block B is placed on block A The mass of block B is less than the mass of block A. Friction exists between the blocks, whereas the ground on which the block A is placed is taken to be smooth. A horizontal force F, increasing linearly with time begins to act on B. The acceleration \(a_{A} and a_{B}\) of blocks A and B respectively are plotted against ‘t’. Determine the correctly plotted graph w.r.t. given information.
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Question 37 of 45
37. Question
A man is standing at a spring platform. Reading of spring balance is 60 kg wt. Determine the change in reading of spring balance, if a man jumps outside platform.
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Question 38 of 45
38. Question
A cold soft drink is kept on the balance. What is the resultant, if the cap is open?
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Question 39 of 45
39. Question
Statement 1: Acceleration is given by slope of momentum versus time curve.
Statement 2: The acceleration is the rate of change of momentum.
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Question 40 of 45
40. Question
There is a simple pendulum hanging from the ceiling of a lift. When the lift is stationery, the time period of the pendulum is T. If the resultant acceleration becomes g/4, then what is the new time period of the pendulum?
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Question 41 of 45
41. Question
Statement 1: If a ball of mass’m’ hits normally a wall with a velocity V and rebounds v.oth same velocity V, then the impulse imparted to the ball is 2mv.
Statement 2: Impulse = change in linear momentum.
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Question 42 of 45
42. Question
A block of mass 4 kg is suspended through two light spring balances A and B. Then evaluate the respective readings of A and B
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Question 43 of 45
43. Question
Statement 1: Considering gravity a body falling freely becomes weightless.
Statement 2: Reaction on the body R = m(g – a).
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Question 44 of 45
44. Question
A mass of 10 gm is suspended by a string and the entire system is falling with a uniform acceleration of \(400 cm/s^{2}.\) Then find the tension in the string, \((g = 980 cm/s^{2})\)
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Question 45 of 45
45. Question
Find the correct order of forces.
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