if the boy throw with velocity 10ms-¹ find the a)Kinetic energy of the ball at the beginning b) Kinetic energy of the ball at the highest point c) potential energy of the ball at the highest point
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a. m= 2 kg { as you have not given the mass so I have taken 2 kg as mass.} , v= 10m/s
K.E.= 1/2 * m*v*v
K.E.= 1/2 *2*10*10
K.E.= 20 J
b. K.E= 20J
c. P.E.= m*g*h
P.E.= 2*9.8*12 { as you have not given the height so I have taken 12 m as height.}
P.E.=235.2 J
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