Kinetic energy is energy that is in motion, thats all I remember
        
                    
             
        
        
        
A joule is one Newton of force applied over a meter. 
For every meter, the brakes put 240000N of force (N=Newtons). 
For 40m, multiply the Newtons by 40. 
240000N*40=9600000N
        
             
        
        
        
Answer:
Explanation:
Given

angular velocity 
Combined moment of inertia of stool,student and bricks 
Now student pull off his hands so as to increase its speed to suppose  rev/s
 rev/s
 
  
After Pulling off hands so final moment of inertia is

Conserving angular momentum  as no external torque is applied




 
        
             
        
        
        
Answer:
When you jump off a train, you jump off a certain height and your downwards (vertical) velocity is zero. But your forward (horizontal) velocity is not. You will hit the ground on split second with your horizontal velocity practically the same as the train. 
Explanation:
you be in serious injury.