Question

begin{tabular}{l}
( D_{13}=2000 mathrm{J} )
hline( D_{B}=0 )
end{tabular}
At P ( left(P in J_{c}=m g H=40 times 10 times 2.5right. )
( (2) cdot E k=1000 J )
Sinu: totel Emery is comperved 50, ( left.(P E)_{B}+mid K Eright)_{B}=(P E) c+(K cdot E) c )
( Rightarrow 2000=1000+(K in) cup Rightarrow(X E) C=1000 ) Joule

# -- Joom 10. An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half-way down.

Solution