# Mechanics II

1. the square of time period of planets is directly proportional to ____of mean distance between sun and planet in kepler’s law or periods

a. square

b. forth

c. same

d. cube

Correct Option: d

2. all planets moves in _______orbits around the sun

a. elliptical

b. circular

c. parabolic

d. hyperbolic

Correct Option: a

3. the product of ______and height from reference point is gravitational potenyial energy

a. gravity

b. force

c. weight

d. mass

Correct Option: c

4. central force is directed _______the line joining the two particles

a. perpendicular

b. mean

c. along

d. parallel

Correct Option: c

5. the uniform spherical shell of matter exert _____gravitational force on particle located inside it

a. minimum

b. strong

c. no

d. maximum

Correct Option: c

6. eccentricity value ranges from zero to_______

a. thousand

b. unity

c. infinity

d. hundred

Correct Option: b

7. the ellipse with e=0 is called_______

a. ellipse

b. circle

c. hyperbola

d. parabola

Correct Option: b

8. the eccentricity is measure of _______of orbit

a. size

b. distance

c. height

d. shape

Correct Option: d

9. the semi-major axis is measure of ________of orbit

a. shape

b. distance

c. height

d. size

Correct Option: d

10. kepler’s law of orbits has _________parts

a. three

b. three

c. two

d. no

Correct Option: c

11. the farthest distance of planet from sun is called______

a. rotation

b. dispalcement

c. Aphelion

d. perihelion

Correct Option: c

12. the speed at which any planet moves through space is ____________

a. remain same

b. maximum

c. minimum

d. constantly changing

Correct Option: d

13. the mass of planet is ________

a. constant

b. change with speed

c. haviest

d. lightest

Correct Option: a

14. the surface potential energy per unit area of surface is called ______

a. kinetic energy

b. surface tension

c. elasticity

d. pressure

Correct Option: b

15. the SI unit of pressure is equal to SI unit of____

a. surface tension

b. stress

c. force

d. strain

Correct Option: b

a. elastic

b. ductile

c. hard

d. brittle

Correct Option: b

17. the region in stress-strain curve in which material become permantely changed is called______region

a. fracture

b. plastic

c. elastic

d. yield point

Correct Option: b

18. the unit of modulus of elesticity is__

a. Nm

b. joule

c. pascal

d. no unit

Correct Option: c

19. modulus of elasticity have ________types

a. two

b. four

c. three

d. one

Correct Option: c

20. the ________is equal to change in potential energy

a. surface tension

b. work done

c. kinetic energy

d. elasticity

Correct Option: b

21. surface tension  is responsible for ____of liquid droplets

a. size

b. weight

c. height

d. shape

Correct Option: d

a. weekly

c. minimum

d. strongly

Correct Option: d

23. sphere has __________possible surface area to volume ratio

a. infinite

b. smallest

c. largest

d. strongest

Correct Option: b

24. surface tensionn is cause dby ___in similar molecules

a. cohesion

c. force

d. attraction

Correct Option: a

25. in cylinders ,the flow of velocity depends upon ______

a. mass

b. force

d. length

Correct Option: c

26. the coefficient of viscosity ______with increase in temperature

a. become infinite

b. decrease

c. increase

d. remain same

Correct Option: b

27. SI unit of angular velocity is

b. Deg/s

c. Rev/s

d. Str/s

Correct Option: a

28. The radial component of linear acceleration is

a. r*b

b. m/s

c. ω^2 r

d. r*a

Correct Option: c

29. SI unit of angular momentum is

a. Nm/C

b. joule second

c. kgm/s

d. Nm/s

Correct Option: b

30. magnitude of angular momentum is ____________when r and P are parallel

a. minimum

b. same

c. zero

d. maximum

Correct Option: c

31. rate of change of angular momentum is equal to:

a. torque

b. acceleration

c. velocity

d. area

Correct Option: a

32. SI unit of moment of inertia is

a. kgm^2

b. kgm^-2

c. N/m

d. joule/sec

Correct Option: a

33. torque is analogue to______

a. acceleration

b. inertia

c. force

d. momentum

Correct Option: c

34. parallel axis theorem is very use ful tool for computing ______________of different bodies about any axis of rotation

a. rotational K.E

b. torque

c. momentum

d. moment of inertia

Correct Option: d

35. rotational inertia of disc about diameter of disc is

a. ¼  MR^2

b. 1/2  MR^2

c. 1/3MR^2

d. 1/6  MR^2

Correct Option: a

36. the disc is symmetrical about its ______

a. height

b. axis

c. center

d. length

Correct Option: c

37. the product of moment  of inertia and _____________is equal to angular momentum

a. angular velocity

b. angular displacement

c. angular acceleration

d. momentum

Correct Option: a

a. 57

b. 50

c. 52

d. 51

Correct Option: a

39. the irregular and non-steady fluid flow is called__________flow

b. swift

c. terbulant

d. regular

Correct Option: c

40. the fluid at rest is called ____fluid

b. terbulant

c. laminar

d. static

Correct Option: d

41. the fluid must be non- _________________and non-rotational during laminar flow:

a. translational

b. rotational

c. vibrational

d. compressible

Correct Option: d

42. the change in K.E is equal to ____

a. torque

b. momentum

c. work done

d. potential energy

Correct Option: c

43. in Bernoulli’s equation , the term P+pgh is called______pressure

a. static

b. dynamic

c. rotational

d. translational

Correct Option: a

44. SI unit of coefficient of viscosity is

a. Ns/m^2

b. Ns/m

c. N/m^2

d. Nm/C

Correct Option: a

45. SI unit of surface tension is

a. N/ms

b. J/s

c. N/m

d. Ns/m

Correct Option: c

46. high carbon  steel is______material

a. brittle

b. ductile

c. glassy

d. elastic

Correct Option: a

47. SI unit of strain is

a. Nm/s

b. No unit

c. j/s

d. N/m

Correct Option: b

48. unit of stress is equal to unit of

a. viscosity

b. pressure

c. force

d. surface tension

Correct Option: b

49. bulk modulus is ratio of ____stress snd strain

a. shear

b. tensile

c. young’s

d. volumetric

Correct Option: d

50. viscosity depends on _____of liquid

a. sixe

b. shape

c. geometery

d. nature

Correct Option: d