Answers

2015-11-22T14:51:04+05:30
For a freely falling body,
v=gt

where g is acceleration due to gravity and t is time.
g=10 m/s²
t=2s

v=gt
So v=10*2
       = 20 m/s

(Thus in 2s body would travel a distance of 40 m from release point)
                                                 
Kinetic Energy K=1/2 mv²

m=2kg
v=20m/s

So K= 1/2 * 2 *20²
        = 1 * 400
        = 400 J

Thus the Kinetic Energy of the body would be 400 J at the end of 2s.
0