Question

State the law of conservation of energy.
m=5kg, g=10m/s , h =50m

Answer 1

According to law of conservation of energy states that energy cannot be created nor destroyed it can be converted from one forn to another form.
Here topmost point energy is potential:
mgh =5×10×50=2500 J
also initial velocity=0 m/s,
2as= (v×v)-(u×u)
2×10×50=(v)2-(0)2
1000=(v)2
v=root 1000
v=10×root 10
Now at ground level energy is kinetic :
1/2mv×v=1/2×5×10 root10×10 root10
=1/2×5×1000=2500 J