What is work done by centripetal force?

The direction of centripetal force is always perpendicular to the direction of instantaneous velocity. The instantaneous displacement is in the direction of instantaneous velocity, therefore instantaneous displacement of particle is perpendicular to centripetal force. Hence work done by centripetal force is zero.

What is the work done when the force of an object is zero?

The object moves in such a way that the point of application of the force remains fixed (dx=0). …

What is workless force give an example?

There are many important examples of forces which do no work because they act perpendicular to the motion. For circular motion, the centripetal force always acts at right angles to the motion. It changes the direction of the motion, but it does no work on the object. This can be applied to any circular orbit.

Why centripetal force is no work force?

As the centripetal force acts upon an object moving in a circle at constant speed, the force always acts inward as the velocity of the object is directed tangent to the circle. Thus, the work done by the centripetal force in the case of uniform circular motion is 0 Joules.

What is the best form of power?

Nuclear Has The Highest Capacity Factor As you can see, nuclear energy has by far the highest capacity factor of any other energy source. This basically means nuclear power plants are producing maximum power more than 93% of the time during the year.

Why are attractive forces negative?

You would have learnt this thing in chemistry (In Atom Structure, you would have calculated energy of electrons for different energy levels b/w electron & proton(nucleus)), that attractive force reduces the energy of the electrons and repulsive force increases the energy of electrons) So since energy corresponding to …

Can work done be negative?

Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work. If the force has a component in the direction opposite to the displacement, the force does negative work.

How many types of power do we have?

In the late 1950’s, John French and Bertram Raven published “The bases of social power” which included five distinct types of power. They later added a sixth. All six of these types of power are part of the fundamental knowledge that all leaders must possess to be effective.

Is power can be negative?

The sign of power is just a matter of definition. Energy can increase or decrease, but the energy itself cannot be negative. As you said, power is just the time rate of change of energy, so it can be negative. But energy is only positive.

What is the positive negative and zero work?

Positive work done – The work done is said to be positive when force and displacement are in the same direction. Zero work – the work done is said to be zero when force and displacement are perpendicular to each other.

What is a negative power?

A positive exponent tells us how many times to multiply a base number, and a negative exponent tells us how many times to divide a base number. We can rewrite negative exponents like x⁻ⁿ as 1 / xⁿ. For example, 2⁻⁴ = 1 / (2⁴) = 1/16.

Can work be done without force?

Answer: If there is no motion in the direction of the force, then no work is done by that force. But the work done on the box is zero since by moving in a straight line at constant speed, its energy is remaining the same.

Can work done be 0?

Zero work is done when the displacement of a body is zero or perpendicular (θ=900,cosθ=0) to the direction of force applied, then work done is zero. Thus, the force applied and the displacement are in perpendicular directions. So, the work done is zero.

What is meant by centrifugal force?

Centripetal force is defined as, “the force that is necessary to keep an object moving in a curved path and that is directed inward toward the center of rotation,” while centrifugal force is defined as “the apparent force that is felt by an object moving in a curved path that acts outwardly away from the center of …

What is workless force?

That means, one or more forces can act on a body perpendicular to the direction of motion. If point of action of these forces makes an angle of 90° with the direction of displacement, then these forces do not perform any work. This type of force is called workless force.

Why is work done negative?

Negative work follows when the force has a component opposite or against the displacement. Negative work removes or dissipates energy from the system. Two examples: In pulling a box of books along a rough floor at constant velocity, I do positive work on the box, that is I put energy into the system.

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