QUIZ - Engineering Mechanics
1. The resultant R of the two forces F1 and F2, as shown, is given by
2. A block of 20 kg is resting on a surface. Determine force required to slide the block on the surface if acceleration due to gravity is 10 m/sē and the coefficient of friction between the block and the surface is 0.25.
a. 20 N b. 200 N c. 50 N d. 25 N
3. Pan A contains 5 kg of cast iron. Pan B contains 5 kg of liquid coolant. Now select appropriate observation from following,
a. Pan A is heavier to lift than Pan B b. Pan A is lighter to lift than Pan B
c. Pan A and Pan B will require same force to lift d. Lifting force depends on the density, hence it must be given to find answer
4. Object A weighing 5 kg and object B weighing 1 kg are freely released from a height of 10 m from the ground. (Neglecting air resistance)
a. Object A will reach the ground earlier b. Object B will reach the ground earlier
c. Objects A & B will reach the ground in same time d. Time of travel depends on the material, hence it must be mentioned to find answer
5. Centroid of triangle ABC shown in figure will have coordinates
a. (10, 3) b. (10, 6) c. (5, 3) d. (5, 6)
6. Two simply supported beams having equal lengths are shown in figure. Select the CORRECT statement.
7. A displacement versus time diagram of a particle is shown in figure. If B is topmost point of the curve, velocity at B will be
a. Positive b. Zero c. Negative d. Depends on the mathematical equation of motion, so can't say
8. A mass "m" is released from height "h" freely. Neglecting air resistance, after it has completed travel of "h/2" distance, total energy possessed by the mass will
a. increase b. decrease c. remain same d. can't say
9. A mass "m" is released from height "h" freely. Neglecting air resistance, after it has completed travel of "h/2" distance, potential energy (PE) possessed by the mass will
a. half of the original PE b. double of the original PE c. same as the original PE d. can't say
10. A mass "m" is released from height "h" freely. Neglecting air resistance, if the mass has traveled distance "h1" in 1 second, then in total 2 seconds its travel will be
a. equal to (2*h1) b. less than (2*h1) c. greater than (2*h1) d. can't say