In SI units, the units of force and energy are respectively___________________?

Related Mcqs:

1. 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

2. If the kinetic energy and potential energy of a simple harmonic oscillator of amplitude A are both equal to half the total energy, then the displacement is equal to_________________?

   A. A
   B. A/2
   C. A/V2
   D. AV2

3. A quantity measured in the C.G.S system of units has dimensions M”2L3 T3/2. What numerical factor would be required to convert the quantity to SI units ?

   A. 1
   B. 100
   C. 1/100
   D. 1/10000

4. A rope is wrapped twice around a rough pole with a coefficient of friction ‘A . It is subjected to a force Fj at one end and a gradually increasing force F2 is applied at the other end till the rope just starts slip-ping. At this instant the ratio of F2 to Fi is_____________________?

   A. 1
   B. e2*
   C. e4*
   D. e*72

5. A simple pendulum of length / has an energy E, when its amplitude is A. If the length of pendulum is doubled, the energy will be___________________?

   A. E
   B. E/2
   C. 2E
   D. 4E

6. A simple pendulum of length 1 has an energy E when its amplitude is A. If its amplitude is increased to 2 A, the energy becomes____________________?

   A. E
   B. E/2
   C. 2E
   D. 4E

7. The ratio of kinetic energy and potential energy of a simple harmonic oscillator, at a displacement equal to half its amplitude is given by__________________?

   A. 1:2
   B. 1:1
   C. 2:1
   D. 3:1

8. A flywheel of moment of inertia 20 kg-m” is acted upon by a tangential force of 5 N at 2 m from its axis, for 3 seconds. The increase in angular velocity in radian persecond is__________________?

   A. 1/2
   B. 3/2
   C. 2
   D. 3

9. 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

10. The torque produced by a force depends on__________________?

    1) the magnitude of the force
    2) the direction of the force
    3) the’point of application of the force relative to origin
    The correct answer is?

    A. only (1)
    B. both (1) and (2)
    C. both (1) and (3)
    D. all (1), (2) and (3)