A bicyclist comes to a skidding stop in $$10$$ m. During this process, the force on the bicycle due to the road is $$200$$ N is directly opposed to the motion. The work done by the cycle on the road is:

 1 $$+2000$$ J 2 $$-200$$ J 3 zero 4 $$-20000$$ J
Subtopic: Â Work done by constant force |
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From NCERT
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The work done by gravity on a projectile of mass $$m$$ fired with a speed $$u$$ at an angle $$\theta$$ to the horizontal, until the time of impact is:

 1 zero 2 $$-\frac12mu^2cos^2\theta$$ 3 $$-\frac12mu^2sin^2\theta$$ 4 $$-\frac12mu^2$$
Subtopic: Â Work done by constant force |
Â 58%
From NCERT
A force of $$100$$ N acts on a block, always acting opposite to its velocity. The block moves from $$x=4$$ m to $$x=10$$ m and then to $$x=6$$ m. The work done by the force is:
1.  $$200$$ J
2.  $$-200$$ J
3.  $$1000$$ J
4.  $$-1000$$ J