CBSE-XI-Physics
47: The Special Theory of Relativity
- #6If a constant force acts on a particle, its acceleration will
(a) remain constant
(b) gradually decrease
(c) gradually increase
(d) de undefineddigAnsr: dAns : (d) gradually decrease
If a constant force is acting on a particle, the force will tend to accelerate the particle and increase its speed. But, due to increase in speed, the mass of the particle will increase by the relation `` m=\frac{{m}_{o}}{\sqrt{1-{\displaystyle \frac{{v}^{2}}{{c}^{2}}}}}`` leading to decrease in acceleration as constant force is acting. Therefore, after sometime its acceleration will start decreasing gradually.
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