Question

calculate the kinetic energy of a body of mass 50 gram moving with velocity 54 km per hour​

Answer 1

Answer:Given,

Mass m=50kg

Velocity=50cms  

−1

 

1cm=0.01m

So, velocity=50×0.01ms  

−1

 

v=0.5ms  

−1

 

We know,

Kinetic energy =  

2

1

​  

mv  

2

 

Substituting value of m and v in the equation:

Kinetic energy =  

2

1

​  

×50×0.5  

2

 

=6.25J

Explanation: