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- Question
Ball A of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/s hits an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after impact would be
Options- A. zero
- B. 5 m/sec
- C. 10 m/sec
- D. none of these.
- Correct Answer
- 10 m/sec
- 1. The units of moment of inertia of an area, are
Options- A. kg/m
- B. kg/m2
- C. m4
- D. m3
- E. kg-m2. Discuss
- 2. Newton's law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation
Options- A. is directly proportional to their velocity of approach
- B. is inversely proportional to their velocity of approach
- C. bears a constant ratio to their velocity of approach
- D. is equal to the sum of their velocities of approach. Discuss
- 3. A particle moves with a velocity of 2 m/sec in a straight line with a negative acceleration of 0.1 m/sec2. Time required to traverse a distance of 1.5 m, is
Options- A. 40 sec
- B. 30 sec
- C. 20 sec
- D. 15 sec
- E. 10 sec. Discuss
- 4. According to Law of Triangle of Forces
Options- A. three forces acting at a point, can be rep-resented by the sides of a triangle, each side being in proportion to the force
- B. three forces acting along the sides of a triangle are always in equilibrium
- C. if three forces acting on a, point can be represented.in magnitude and direction, by the sides of a triangle taken in order, these will be in equilibrium
- D. if three forces acting at a point are in equilibrium each force is proportional to the sine of the angle between the other two
- E. if the forces acting on a particle be represented in magnitude and direction by the two sides of a triangle taken in order, their resultant will be represented in magnitude and direction by the third side of the triangle, taken in opposite order. Discuss
- 5. A pilot flies a small plane in a vertical loop of radius r. At the top of its trajectory he experiences weightlessness. If the acceleration due to gravity is g, the speed of the plane at the top of its trajectory would be
Options- A. zero
- B. infinite
- C. gr
- D. 2gr. Discuss
- 6. Equation of motion of a point in a straight line, is
Options- A. v = u + ft
- B. S = ut +
ft2 - C. 2fS = v2 - u2
- D. all the above. Discuss
- 7. The resolved part of the resultant of two forces inclined at an angle ? in a given direction is
Options- A. algebraic sum of the resolved parts of the forces in the direction
- B. arithmetical sum of the resolved parts of the forces in the direction
- C. difference of the forces multiplied by cosine ?°
- D. sum of the forces multiplied by the sine ?
- E. sum of the forces multiplied by the tangent ?°. Discuss
- 8. The shape of a suspended cable under its own weight, is
Options- A. parabolic
- B. circular
- C. catenary
- D. elliptical. Discuss
- 9. When a body of mass M1 is hanging freely and an other of mass M2 lying on a smooth inclined plane(?) are connected by a light indextensible string passing over a smooth pulley, the acceleration of the body of mass M1, will be given by
Options- A.
- B.
- C.
- D.
Discuss
- 10. One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. The tension in the string is
Options- A. 17.5 kg
- B. 19.5 kg
- C. 22.5 kg
- D. 25 kg. Discuss
Applied Mechanics problems
Search Results
Correct Answer: m4
Correct Answer: bears a constant ratio to their velocity of approach
Correct Answer: 20 sec
Correct Answer: if the forces acting on a particle be represented in magnitude and direction by the two sides of a triangle taken in order, their resultant will be represented in magnitude and direction by the third side of the triangle, taken in opposite order.
Correct Answer: gr
Correct Answer: all the above.
Correct Answer: algebraic sum of the resolved parts of the forces in the direction
Correct Answer: catenary
Correct Answer:
Correct Answer: 22.5 kg
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