Physics MCQS

41. Mechanical advantage of an inclined plane can be found by which formula?
A) Slopelength/height
(B) Height/Slopelength
(C) Both of the above
(D) None of the above

42. What is the unit of work?
A) Joule
(B) Metre
(C) Watt
(D) Newton

43. Under the action of a torque, if the rotation produced is anticlockwise, the torque is considered to be?
(A) One
(B) Zero
C) Positive
(D) Negative

44. Rate of change of velocity is called?
A) Acceleration
(B) Displacement
(C) Distance
(D) Relative motion

45. The matter of the sun is in _ state.
(A) Gas
B) Plasma
(C) Liquid
(D) Solid

46. Centripetal acceleration ac=_.
A) v²/r
(B) g²/r
(C) ma
(D) mv²/r

47. Unit of viscosity is?
(A) kgms⁻²
B) kgm⁻¹s⁻¹
(C) kgm²s
(D) kgm²s²

48. A truck accelerates uniformly from 15 m/s in 5s. What is the acceleration of the truck?

a) 2ms⁻²
b) 1.5ms⁻²
c) 1 ms⁻²
d) 2.5ms⁻²

49. A car moving along a straight line at 20 m/s undergoes an acceleration of 4ms⁻². After 2 seconds, its speed will be:

a) 28 m/s
b) 16 m/s
c) 12 m/s
d) 8 m/s

50. A bird begins to accelerate at a constant 0.3ms⁻². Its change in velocity is:

a) 0.9 m/s
b) 1.5 m/s
c) 1.95 m/s
d) 2.4 m/s