Why torque and work done are not possible by centripetal force?

Without it, the circular motion is not possible. The work done by the centripetal force is zero because the displacement of the particle (tangential) is perpendicular to the direction of the centripetal force (radial) i.e. there is no displacement in the direction of the centripetal force.

When centripetal force ceases to act the centrifugal force becomes?

The centrifugal force is a pseudo-force because if the centripetal force ceased for an object in circular motion, the centrifugal force the body is “feeling” would instantly disappear, and the object would travel tangentially to its line of motion.

Can a centripetal force do work?

ANSWER: The centripetal force is always perpendicular to the direction of motion. Only the component of the force in the direction of motion can do work. The centripetal force has no such component, so it can never do work.

Can work be done on a system if there is no movement?

Can work be done on a system if there is no motion? No, because of the way work is defined.

What are the two conditions when no work is done by a force?

Two conditions are : No work is said to be done if there is no change in position or no motion even after the application of force. There should be no displacement i.e. S = 0. When the angle between the displacement and force applied is 90 degrees i.e the force applied is perpendicular to the displacement.

How does centripetal force affect the speed of an object?

Work = Force * displacement * cosine (Theta) So if an object is moving in a horizontal circle at constant speed, the centripetal force does not do work and cannot alter the total mechanical energy of the object. For this reason, the kinetic energy and therefore, the speed of the object will remain constant.

Why does a particle spiral in a circular motion?

2 Answers 2. The radial acceleration due to centripetal force is just enough to make the object miss the center by the same amount every instant, which results in the distance to the center remaining constant. This is why the motion is circular in the first place; if the acceleration was bigger, the particle would indeed spiral inwards.

How does the unbalanced force affect the direction of motion?

There is an unbalanced force in the opposite direction as the block’s motion. A force directed opposite an object’s motion will cause a decrease in speed. This unbalanced force has two components – one is downward and the other is rightward. Downward components of force cannot alter rightward speeds.

What happens if there is no acceleration at the center?

No acceleration means an increasing distance from the center. So, if we want it to stay a constant distance from the center instead (which is required for circular motion), there must be acceleration towards the center. If you do out the geometry, you find that the required acceleration is the one given in the textbooks: