JEE MAIN - Physics (2004 - No. 45)
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 particles takes place in a plane. It follows that
its kinetic energy is constant
is acceleration is constant
its velocity is constant
it moves in a straight line
توضيح
Work done by such force is always zero when a force of constant magnitude always at right angle to the velocity of a particle when the motion of the particle takes place in a plane.
$$\therefore$$ From work-energy theorem, $$ \Delta K = 0$$
$$\therefore$$ $$K$$ remains constant.
$$\therefore$$ From work-energy theorem, $$ \Delta K = 0$$
$$\therefore$$ $$K$$ remains constant.