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Quiz 2
Mdcat-past-papers - NUMS - Physics Quiz
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Board: NUMS | Subject: Physics |
21. The slope of a displacement-time graph is equal to:
Velocity
Acceleration
Displacement
Distance
22. A 3 kg stone falls from a 20 m high platform. Find its falling speed at 10 m height:
196 m/s
14 m/s
10 m/s
100 m/s
23. Two stones of 10 kg and 50 kg fall through an 80 m high cliff. Which stone has maximum velocity at the bottom? (g = 10 m/s²)
10 kg
50 kg
Both have same velocity
None
24. Two buses moving at 100 km/h and 80 km/h respectively cross each other while moving in opposite directions. Velocity of one bus relative to the other is:
100 km/h
20 km/h
80 km/h
180 km/h
25. An elastic collision is the one in which:
Kinetic energy and momentum is conserved
Kinetic energy is conserved but total energy is not conserved
Momentum is conserved but kinetic energy is not conserved
Both kinetic energy and momentum are not conserved
26. The explosion of explosive material is application of:
Newton's 1st law
Newton's 2nd law
Law of conservation of momentum
Law of gravitation
27. The product of force and time is equal to:
Angular momentum
Force
Change in momentum
Velocity
28. The time rate of change of linear momentum of a body is equal to
Force
Momentum
Power
Acceleration
29. Which of the following is not true?
Momentum is quantity of motion
Unit of momentum is Ns
Momentum is not a vector quantity
Momentum is product of mass & velocity
30. Which of the following pair of angles have same range for a projectile?
10° and 20°
75° and 15°
45° and 60°
0° and 30°
31. The angle of projection of a projectile for which its maximum height and horizontal range are equal is:
45°
90°
0°
70°
32. In projectile motion the range of projectile is maximum at:
30°
45°
60°
90°
33. In perfect elastic collision:
Only momentum is conserved
Only total energy is conserved
Only kinetic energy is conserved
Momentum, kinetic energy and total energy is conserved
34. The product of force and time is equal to:
Angular momentum
Torque
Change in momentum
Force
35. If you stop your car quickly by wearing seat belts, chance of injury is greatly reduced because seat belt supplied:
Extra force
Perpendicular force
Opposite force
Zero force
36. Two bodies are projected at an angle of α and (90° – α) to the horizontal with same speed. The ratio between their time of flight is:
cos α : 1
sin α : 1
sin α : cos α
cos α : sin α
37. Which one of the following is the angle of projection of a projectile if its range is equal to its maximum height?
76°
90°
45°
63.4°
38. In a projectile, range will be maximum at an angle of:
30°
45°
90°
75°
39. Range of a projectile on a horizontal plane is same for the following pair of angles:
15° & 30°
75° & 15°
60° & 20°
50° & 25°
40. At what point during the motion of projectile its vertical component of velocity is zero:
Point of projection
Landing point
Highest point
Just before landing
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