Question

What is the momentum of an object of mass 30 kg and velocity 400cm/s​

Answer 1

Forces acting on the block are of chain and gravity. By work energy theoremW  

c

​

+W  

g

​

=  

2

1

​

mv  

2

−  

2

1

​

mu  

2

 

W  

c

​

+mgh=  

2

1

​

mv  

2

−0

⇒W  

c

​

=  

2

1

​

×30×0.4  

2

−30×10×2=−597.6J

mark brainlest