Physics, asked by ruzankhan11gmailcom, 7 months ago


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

Answers

Answered by Anonymous
2

Let the initial velocity of the object be u. Let an external force be applied on it so that it gets displaced by distance s and its velocity becomes v. In this scenario, the kinetic energy of the moving body is equal to the work that was required to change its velocity from u to v.

Answered by rohitjha2005
0

Answer:

Explanation:

he Work done by Force on the object is :  

Workdone = Force x displacement.

             W=F×S                  ____(1).

From third equation of motion;

V^2-U^2=2as

S=  V^2-U^2/2as

​  

 ______(2)

By Newtons second law of motion:

F=ma

From equation 1 and 2

W=  m*a* (V^2-U^2)/2a

 

As we have assumed object is at rest, U=0

W=  mV^2/2

​  

 

The Work  Done appears as kinetic energy of the body.

Therefore,  

K.E=(  mV^2/2

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