Question

12. Calculate the decrease in the kinetic energy of a
t-moving body if its velocity reduces to half of the
3
initial velocity
Ans. )th of the initial value
4​

Answer 1

Answer:

K.E=0.5×m×v  

2

 

K.E(new)=0.5×m×(v/3)  

2

 

K.E(new)=0.5×m×v  

2

/9

K.E−K.E(new)=(1−1/9)0.5×m×v  

2

=(8/9)0.5×m×v  

2

 

Hence this is the decrease in Kinetic energy.