Question

If an object is having a velocity of 5 m/s and it changes its velocity into 10 m/s in 20 sec, then find the​

Answer 1

Answer:

-210J

Explanation:

Given :          Initial velocity     u=5  m/s

                     Final velocity     v=2  m/s

The work done is equal to the change in the kinetic energy of an object.

W=  

2

1

​  

m(v  

2

−u  

2

)

W=  

2

1

​  

×20×(2  

2

−5  

2

)

⟹W=−210 J