A loaded and an unloaded cart are moving with same kinetic energies such that same retarding force acts on them and they finally stop after covering "S1" and "S2" distances respectively, which of the following is true?
Correct answer: A. S1=S2
- A. S1=S2
- B. S1<S2
- C. S1>S2
- D. None of these
Explanation
According to Work-Energy PrincipleChange in K.E= W frictionChange in K.E = FdcosStopping distance = dSince both cars have same K.E, so their stopping distances are also equal.
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The work-energy theorem states that the net work done on an object equals its change in kinetic energy. Questions involve positive and negative work, variable forces and force-displacement graphs, acceleration or deceleration, and the difference between this theorem and conservation of mechanical energy, which also requires attention to potential energy and non-conservative work.
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