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- Try this! A particle is acted upon by a force of constantmagnitude which is always perpendicular to the velocity of the particle, the motion of the particle takes place in a plane. It follows that
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle, the motion of the particle takes place in a plane. It follows that
| Option 1)
its velocity is constant |
Option 2)
its acceleration is constant |
| Option 3)
its kinetic energy is constant |
Option 4)
it moves in a straight line. |
Answers (2)
As we learnt in
Work done by time dependent force -
- wherein
Where and
are force and velocity vector at any instant
In this case since force is constant and it is always perpendicular to velocity so work done by this force is zero. Hence speed or kinetic energy remains constant.
Correct answer is 3
Option 1)
its velocity is constant
Option 2)
its acceleration is constant
Option 3)
its kinetic energy is constant
Option 4)
it moves in a straight line.
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