11th class (Fsc) Physics unit 3 MCQs
26. The area under velocity time graph is equal to:
a. Force
b. Distance
c. Work
d. Power
27. A ball is thrown up at an angle of 60o with horizontal, with a speed of 14m/s.the speed of ball at the highest point will be:
a. 7 m/s
b. 14 m/s
c. 16 m/s
d. 0 m/s
28. The mass of an object is quantitative measure of its:
a. Inertia
b. Momentum
c. Energy
d. Acceleration
29. A force of 20N acts along x-axis , its x-component is:
a. 20 N
b. 0 N
c. 30 N
d. 10 N
30. Inertia may expressed in:
a. Watt
b. Kg
c. Joule
d. Newton
31. No body begins to move or comes to rest of itself was given by:
a. Bernoulli
b. Newton
c. Bu Ali Sena
d. Pascal
32. An object of mass 1kg moving with acceleration of 1ms-2 will experience a force of:
a. 1N
b. 10-2N
c. 1 dyne
d. 10-3N
33. Speed of moon around the earth is:
a. 1000 m/s
b. 1200 m/s
c. 900 m/s
d. 1100 m/s
34. The rate of change in momentum of a body is equal to:
a. Acceleration
b. Displacement
c. Applied force
d. Velocity
35. Relativistics Mechanics was developed by:
a. Kepler
b. Newton
c. Einstein
d. Faraday
36. Change of momentum is equal to;
a. Impulse
b. Force
c. Pressure
d. Tension
37. Unit of momentum in SI system is:
a. N2m
b. Nm
c. Ns
d. Nm2
38. The dimensional of impulse is:
a. [ML-1T-1]
b. [MLT]
c. [M-1L-1T-1]
d. [MLT-1]
39. The rate of change of momentum is equal to:
a. Velocity
b. Impulse
c. Force
d. Torque
40. SI unit of impulse is equivalent to that of:
a. Acceleration
b. Force
c. Velocity
d. Momentum
41. Impulse can be defined as:
a. → I = →F X V
b. → I = →F X →D
c. → I = f/t
d. → I = →F X t
42. SI unit of impulse is:
a. N.s
b. Kgms-1
c. N.ms2
d. N.m
43. A force of 10N acts on a body of mass 1kg for 5sec to a distance of 10m.the rate of change of momentum is:
a. 20N
b. 50N
c. 10N
d. 25N
44. At what speed the momentum and kinetic energy of a body having the same?
a. 4 ms-1
b. 1 ms-1
c. 8 ms-1
d. 2 ms-1
45. In the absence of external force, the change in momentum is:
a. Decreasing
b. Zero
c. Increasing
d. Constant
46. Which formula is true?
a. a = F/m
b. m = a/F
c. a = m/F
d. F = m/a
47. SI unit of linear momentum is:
a. Kg m-1s-1
b. Kg m2s-1
c. Kg ms-1
d. Kg m2s-2
48. Kg ms-1 can also be written as:
a. Ns-1
b. Nm
c. Js
d. Ns
49. An alternate unit of kg ms-1 is:
a. Nm
b. Js
c. N
d. Ns
50. What happens when a system of two bodies undergoes an elastic collisions?
a. The bodies come to rest after collision
b. The momentum of the system changes
c. The energy conservation law is violated
d. The momentum of the system does not change