Question:
The work done by a particle moving with a velocity of $0.7\, c$ (where $c$ is the velocity of light) in empty space free of electromagnetic field and far away from all matter is :
The work done by a particle moving with a velocity of $0.7\, c$ (where $c$ is the velocity of light) in empty space free of electromagnetic field and far away from all matter is :
Updated On: Jan 18, 2023
- positive
- negative
- zero
- infinite
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The Correct Option is C
Solution and Explanation
Acceleration of the particle
$a=\frac{d v}{d t}=\frac{d}{d t}(0.7 c)=0 $
$(\because c= $ Constant$ )$
Force on the particle
$F=m a=0$
Thus, work done by a particle will be zero.
$a=\frac{d v}{d t}=\frac{d}{d t}(0.7 c)=0 $
$(\because c= $ Constant$ )$
Force on the particle
$F=m a=0$
Thus, work done by a particle will be zero.
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Concepts Used:
Acceleration
In the real world, everything is always in motion. Objects move at a variable or a constant speed. When someone steps on the accelerator or applies brakes on a car, the speed of the car increases or decreases and the direction of the car changes. In physics, these changes in velocity or directional magnitude of a moving object are represented by acceleration.
