A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of particle takes place in a plane. It follows that (1) It moves in a straight line (2) Its kinetic energy is constant (3) Its velocity is constant (4) Its acceleration is constant
Answers
If the force is perpendicular to the velocity of the particle always, then it is in circular motion with uniform speed.
Answer:
The motion of particle takes place in a plane. (3) Its velocity is constant
Explanation:
Step 1: A constant force acts on a particle, and its strength is always perpendicular to the particle's motion. A plane is where the atom moves when it moves. What among the following could apply to the particle? Its speed fluctuates.
When a force operating perpendicular to a particle's direction of motion is applied, the force only modifies the particle's direction of motion and not its speed. Particle will therefore characterize circular path.
Step 2: At all times during a circular motion, the force is operating perpendicular to the direction of motion. As a consequence, the kinetic energy is constant throughout the motion even though the velocity and acceleration are changing directions at every point.
A charged particle travels through a magnetic field that is directed perpendicular to the path of the particle's motion. Then, while it is moving after that, (1) Its momentum varies but its kinetic energy does not.
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