PHSICS MCQ’S (Chapter#3)
(PHASE-1)
1. Relativistic mechanics was developed by:
(a) Newton
(b) Faraday
(c) Kepler
(d) Einstein
2. When average velocity becomes equal to instantaneous velocity then it is called moving with :
(a) Instantaneous velocity
(b) constant acceleration
(c) constant velocity
(d) variable velocity
3. The slope of velocity-time graph shows the:
(a) Total distance covered by the body
(b) Average distance covered by the body
(c) Average acceleration of the body
(d) Total work done on the body
4. When the moves with constant acceleration, the velocity-time graph is:
(a) Parabola
(b) Hyperbola
(c) Straight line
(d) Curve
5. The area between velocity-time graph and the time axis is numerically equal to:
(a) Speed of object
(b) Distance covered by the object
(c) Acceleration of the object
(d) Average velocity of the object
6. Shortest distance between two points is called:
(a) Speed
(b) Acceleration
(c) Distance
(d) Displacement
7. A ball is thrown up vertically; it takes 3 sec to reach maximum height. Its initial velocity is:
(a) 10ms-1
(b) 12.2ms-1
(c) 15 ms-1
(d) 29.4 ms-1
8. The distance covered by a body in time “t” starting from rest is:
(a) at2
𝑡
(b) v2t
(c) a22
(d)
9. A mass of 1 kg is freely falling. The force of gravity is:
(a) 1 N
(b) 9.8 N
(c) 0.5 N
10. The mass of an object is quantitative measure of its :
(a) Momentum
(b) Acceleration
(c) Inertia
11. Nobody begins to move or comes at rest of itself was given by :
(a) Newton
(b) Pascal
(c) Bernoulli
12. Which formula is true:
𝑎
(a) 𝑚 = 𝐹
𝑎
(b) 𝐹 = 𝑚
𝐹
(c) 𝑎 = 𝑚
13. Kgms-1 can also be written as:
(a) Nm
(b) Ns
(c) Ns-1
14. The rate of change of in momentum of a body is equal to:
(a) Displacement
(b) Velocity
(c) Acceleration
15. Change of momentum is equal to:
(a) Force
(b) Tension
(c) Impulse
16. Unit of momentum in S.I system is:
(a) Nm
(b) Nm2
(c) N2m
17. The dimensional unit of impulse is:
(a) [ MLT ]
(b) [MLT-1]
(c) [ ML-1T-1 ]
18. SI unit of Impulse is equivalent to that of:
(a) Force
(b) Momentum
(c) Acceleration
19. Impulse can be define as:
(a) 𝐼⃗ = 𝐹⃗ × 𝑑⃗
(b) 𝐼⃗ = 𝐹⃗ × 𝑡
(c) 𝐼⃗ = 𝐹⃗ × 𝑣⃗
𝑎𝑡 2
2
(d) Zero
(d) Energy
(d) Bu Ali Sena
(d) 𝑎 =
𝑚
𝐹
(d) Js
(d) Applied force
(d) Pressure
(d) Ns
(d) [ M-1L-1T-1 ]
(d) Velocity
(d) 𝐼⃗ =
𝐹⃗
𝑡
20. A force of 10 N acts on a body of mass 1 kg for 5 sec to a distance of 10 m. The rate of change of
momentum is:
(a) 50 N
(b) 25 N
(c) 20 N
(d) 10 N
21. In the absence of external force, the change in momentum is:
(a) zero
(b) constant
(c) decreasing
(d) increasing
22. A force of 20 N acts along x-axis, its x component is :
(a) 0N
(b) 10N
(c) 20N
(d) 30N
23. When a ball is thrown straight up, the acceleration at its highest point is:
(a) Upward
(b) Downward
(c) Zero
(d) Horizontal
24. For a typical rocket how much mass of rocket is in the form of fuel :
(a) 50%
(b) 60%
(c) 80%
(d) 100%
25. The overcome gravity, fuel consumed by rocket is:
(a) 40000kgms-1
(b) 30000kgms-1
(c) 20000kgms-1
(d)10000kgms-1
26. If the body of mass 2 kg moving with 15ms-1 collides with stationary body of same mass then
after elastic collision the 2nd body will move with the velocity of :
(a) 15 ms-1
(b) 30 ms-1
(c) 0 ms-1
(d) none of these
27. Rocket equation is given as:
(a) a = M/mv
(b) a = Mv/m
(c) a = mv/M
(d) a = m/Mv
28. As the rocket moves upward during its job its acceleration goes on:
(a) Increasing
(b) Decreasing
(c) Remains same
(d) moves with uniform velocity
29. Motion of projectile is:
(a) 1 dimensional
(b) 2 dimensional
(c) 3 dimensional
(d) 4 dimensional
30. The horizontal range is maximum when it is projected at an angle of:
(a) 00
(b) 300
(c) 450
(d) 600
31. The range of projectile is same for:
(a) 00,450
(b) 350,550
(c) 150,600
(d) 300,750
32. The ballistic missiles are used only for :
(a) Long range
(b) Short range
(c) Medium range
(d) Constant range
33. The horizontal component of velocity of Projectile:
(a) Increases
(b) Decreases
(c) Remains same
(d) increase then decrease
34. The velocity of Projectile is maximum at:
(a) Highest point
(b) point of launching (c) half of height
(d) After striking the ground
0
35. The Horizontal range of Projectile at 30 with Horizontal is same as that an angle of:
(a) 450
(b) 600
(c) 900
(d) 1200
36. A projectile is thrown upward with velocity vi making an angle 𝜃 with horizontal the maximum
horizontal range is:
(a)
𝑣𝑖 2
𝑔
(b)
𝑣𝑖 2
2𝑔
(c)
𝑣𝑖 2
𝑔
Sin2𝜃
(d)
𝑣𝑖 2
2𝑔
Sin2𝜃
37. The time of flight of Projectile when it is Projected from the Ground is:
(a)
𝑣𝑖
Cos𝜃
𝑔
(b)
𝑣𝑖
Sin𝜃
𝑔
(c)
2𝑣𝑖
𝑔
Sin𝜃
38. For which pair of angles the range of projectile are equal:
(a) 200,300
(b) 700,200
(c) 600,400
39. Horizontal range is equal for the angles :
(a) 300and 400
(b) 300and 500
(c) 300and 600
40. Rate of change of momentum is equal to :
(a) Force
(b) Momentum
(c) Impulse
41. :
(a)
(b)
(c)
42. :
(a)
(b)
(c)
43. :
(a)
(b)
(c)
44. :
(a)
(b)
(c)
45. :
(a)
(b)
(c)
(d)
𝑣𝑖 2
𝑔
Sin𝜃
(d) 500,100
(d) 300and 900
(d) Torque
(d)
(d)
(d)
(d)
(d)
46. :
(a)
(b)
(c)
(d)
(a)
(b)
(c)
(d)
(a)
(b)
(c)
(d)
(a)
(b)
(c)
(d)
(a)
(b)
(c)
(d)
47. :
48. :
49. :
50. :