A. 1

**B. e2***

C. e4*

D. e*72

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### Related Mcqs:

- A light rope is loaded with many equal weights at equal horizontal intervals. The points of suspension on the rope lie on a_____________________?
**A. parabola**

B. catenary

C. cycloid

D. ellipse - A ladder of weight ‘w’ rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight ‘w’ is to walk to the top of it safely, is tan’1 x, where x is___________________?
A. 1/4

**B. 1/3**

C. 3

D. 4 - A cylinder will slip on an inclined plane of inclination 0 if the coefficient of static friction between plane and cylinder is_____________________?
**A. less than (1/3) tan 0**

B. less than (2/3) tan 0

C. less than (1/3) sin 6

D. less than (2/3) sin 6 - A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is___________________?
A. 1/3

B. 2/3

C. 1/9

**D. 8/9** - Coefficient of friction depends on__________________?
**A. nature of surfaces only**

B. area of contact only

C. both (A) and (B)

D. none of the above - A force P of 50 N and another force Q of unknown magnitude act at 90° to each other. They are balanced by a force of 130 N. The magnitude of Q is__________________?
A. 60 N

B. 80 N

C. 100 N

**D. 120 N** - At the instantaneous center, the velocity of the moving lamina at any instant is_________________?
**A. zero**

B. maximum

C. minimum

D. varying - The pole distance is measured in___________________?
A. distance scale

**B. force scale**

C. mass scale

D. time scale - The ratio of unit of force in gravitational system to that in absolute system is__________________?
A. 1

**B. g**

C. 1/g

D. none of the above

where ‘g’ is acceleration due to gravity - A 2 m long ladder rests against a wall and makes an angle of 30° with the horizontal floor. Where will be the instantaneous center of rotation when the ladder starts slipping ?
**1) 1.0 in from the wall**

2) 1.732 m from the wall

3) 1.0 m above the floor

4) 1.732 m above the floor

The correct answer is?A. (1) and (3)

B. (1) and (4)

C. (2) and (3)

**D. (2) and (4)**

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