Give an example of a situation in which an applied force does not result in a change in kinetic energy.
WD=F.s.cosθ Work Done (WD) in situation will be zero if the angle between force and displacement are 90o. Such as : (i) If a body is moving horizontally with uniform motion the WD by gravity is zero. (ii) Work Done during circular motion. (iii) When the direction of motion of a charge particle is perpendicular to the magnetic field the direction of force due to the magnetic field by Fleming's left hand rule is perpendicular to both direction of motion of charge and magnetic field. So no work is done on charge particle by magnetic field.
