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Kinetic Energy

Does the kine...

Question

Does the kinetic energy of an object depends on its direction of motion ?

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Solution

Kinetic energy does not depends upon the direction of motion of the body, because it is a scalar quantity.

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Q. How does the kinetic energy of a moving body depend on its (i) speed, and (ii) mass?

How does magnetic force only affect direction of velocity and not kinetic energy? As kinetic energy = 1/2 MVsquare and depends on velocity.

Write detailed answers?

a. Explain the difference between potential energy and kinetic energy.

b. Derive the formula for the kinetic energy of an object of mass m, moving with velocity v.

c. Prove that the kinetic energy of a freely falling object on reaching the ground is nothing but the transformation of its initial potential energy.

d. Determine the amount of work done when an object is displaced at an angle of 30^o with respect to the direction of the applied force.

e. If an object has 0 momentum, does it have kinetic energy? Explain your answer.

f. Why is the work done on an object moving with uniform circular motion zero?

Kinetic energy depends on the velocity of the object.

Give one example of motion where an object does not change its speed but it changes the direction of motion continuesly?

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