If a body a mass of 2 kg is raised vertically through 2m, then the work done will be _________________?

Related Mcqs:

1. A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference ?

   A. man does more work than child
   B. child does more work than man
   C. both do the same amount of work
   D. it is a foolish question

2. An elevator weighing 3.5 x 10-6 N is raised to a height of 1000 m in the absence of friction, the work done is_________________?

   A. 3.5 x 10-3 J
   B. 3.5 x 104 J
   C. 3.5 x 106 J
   D. 3.5 x 109 J

3. When a force is parallel to the direction of motion of the body, then work done on the body is_____________________?

   A. zero
   B. minimum
   C. infinity
   D. maximum

4. A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force and the ball goes up to 2 in height further, find the magnitude of the force. Consider g = 10m/s 2

   A. 22N
   B. 16N
   C. 20N
   D. 4N

   Submitted by: Huzaifa Naseer

5. A field in which the work done in a moving a body along closed path is zero is called________________?

   A. electric field
   B. conservative field
   C. electromagnetic field
   D. gravitational field

6. Work done on the body equals to the _____________________?

   A. change in its K.E always
   B. change in its P.E always
   C. change in its K.E and change in its P.E
   D. neither change in K.E and nor change in its P.E

7. As the temperature of black body is raised the wavelength corresponding to maximum intensity________________?

   A. shifts towards longer wavelength
   B. shifts towards shorter wavelength
   C. remain the same
   D. shifts towards longer as well as shorter wavelengths

8. Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are__________________?

   A. Longitudinal
   B. Transverse
   C. Periodic
   D. both A and C

9. A wire suspended vertically from one end is stretched by attaching a weight of 20N to the lower end. The weight stretches the wire by 1mm. How much energy is gained by the wire ?

   A. 0.01J
   B. 0.02J
   C. 0.04J
   D. 1.0J

10. Work done will be maximum if the angle between the force F and displacement d is______________________?

    A. 45°
    B. 90°
    C. 180°
    D. 0°

    Submitted by: admin