Answer:
vf=19.6
h=19.6
FROM FIRST EQUATION that is vf=vi+gt
then vf = 0+9.8*2=19.6m/s
FROM SECOND EQUATION that is H=vi*t+1/2gt²
then H=0*2+1/2*9.8*2²=19.6
Answer:
W
g
=mgs .......(1)
Change in velocity of coconut is,
E=
2
1
m(u−v)
2
=−
2
1
m(v)
2
........(2)
Now, total work done on coconut is equal to change in kinetic energy hence,
W
a
+W
g
=
2
1
mv
2
where, W
a
is work done by air resistance.
Using (1) and (2), we get
W
a
