Question

1. A force of 50N displaces an object by 2 meter. The work done by the force is
a. 1000 joule
b.100 joule
c. 300 joule
d. none of theses
2. A force of 20N is applied on an object at a distance of 1m from the pivoted point. Moment of force will be
a. 20 Nm
b. 25 Nm
c. 30 Nm
d. 40 Nm
3. A body of mass 100 kg is moving with a velocity of 100 m/s. The kinetic energy will be
a. 500000 joule
b. 5000 joule
c. 500 joule
d. none of these
4. Refractive index of a medium is obtained from
a. speed of light in vaccum/speed of light in medium
b. angle of i/angle of r
c. speed of light in the medium/speed of light in vaccum
d. none of these
(Please Give Me Answer Fast Please)
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Answer 1

Answer:

1). w =F.S

50.2= 100

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