Answers

2014-12-13T18:58:30+05:30
We have
         m= 5 kg
         v = 10 m/sec
   Hence KE = (1/2)mv²   =  5*10*10 /2   =250 J
Considering Law of conservation of energy - Kinetic energy of the ball will convert into  potential energy when ball reaches the max height.
   Hence we have Potential Energy= 250 J
         let height =h and acceration due to gravity =g= 9.8 m/sec²
         we have PE=250=mgh=5*9.8*h
                                     ⇒h=5.1m
PE is 250J and Max height gained 5.1m
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2014-12-14T19:07:01+05:30
M=5
v=10
ek= 1/2mv^2
   = 1/2*5*10*10=250J
in this case ek =ep
ep=mgh
 250J  = 5*10h
h = 250/50
   = 5 meters.
this ans is also applicable i have asked my teacher
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