Question

What is the percentage error in the measurements of the kinetic energy of the body, if there is a positive error of 50./. In the speed of a body

Answer 1

Given that,

v

Δv

​  

×100 is the % error in velocity = 50%

Kinetic energy K.E=  

2

1

​  

mv  

2

 

Error in the kinetic energy

K.E

ΔK.E

​  

×100=m×2  

v

Δv

​  

×100

m is as a constant

Now, percentage error

   

K.E

ΔK.E

​  

×100=2  

v

Δv

​  

×100

 

K.E

ΔK.E

​  

×100=2×50%  

 

K.E

ΔK.E

​  

×100=100%

Hence, the error in the measurement of kinetic energy is 100%

Answer 2

Explanation:

hope this helps u friends