Final answer:
Magnetic forces cause circular motion in charged particles by acting perpendicular to their velocity, changing their direction without changing their speed or kinetic energy. This exemplifies the principles of uniform circular motion and demonstrates how kinetic energy is associated with objects in motion.
Step-by-step explanation:
Magnetic force can indeed induce kinetic energy in objects, particularly in moving charged particles. When a charged particle, such as an electron, enters a magnetic field at a right angle, the magnetic force acts upon it perpendicular to its velocity. This perpendicular force does not increase or decrease the particle's speed but changes its direction, causing circular motion. The kinetic energy of the charged particle remains constant during this process, as no work is done on the particle by the magnetic force. This is a clear example of uniform circular motion, where the magnetic force provides the necessary centripetal force for the motion, calculated by the formula F = mv²/r.
Moreover, when considering kinetic energy and potential energy in general, any object in motion has kinetic energy. This is the energy it possesses due to motion; for instance, a speeding bullet or a flying airplane both exhibit kinetic energy. Conversely, potential energy is the energy stored due to an object's position or structure, like a brick wall standing intact. When a change occurs, such as a wall collapsing, potential energy is converted into kinetic energy as the bricks fall.