Question

If a constant force acts on a particle, its acceleration will ______________ .

विकल्प

• remain constant

• gradually decrease

• gradually increase

• be undefined

Answer 1

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 \[m = \frac{m_o}{\sqrt{1 - \frac{v^2}{c^2}}}\] leading to decrease in acceleration as constant force is acting. Therefore, after sometime its acceleration will start decreasing gradually.