Question

A body of mass m is moving with a velocity of 4 m/s. Find the mass of the body if its kinetic energy is 32 J.

Answer 1

Answer:

Explanation:Given , Mass of object, m=10 kg

Velocity of object, v=20ms  

−1

 

Initial Kinetic energy, K  

1

​

=  

2

1

​

×10×20  

2

=2000 J

Now, Final mass, m  

2

​

=20 kg

Final Velocity, v  

2

​

=10m/s

Final Kinetic energy, K  

2

​

=  

2

1

​

×20×10  

2

=1000 J

Required Ratio =  

K  

2

​

 

K  

1

​

 

​

=  

1000

2000

​

=2:1

Answer 2

Answer:

Explanation:

What is kinetic energy

Please tell