Explanation:
The velocity is not needed. (its needed to find kinetic energy but its irrelevant to the question)
Potential energy = Mgh
Mass=5kg, height=10meters, g=9.8
P.e=5×9.8×10
=5×98
=490 joules
Hope it helps
:)
Answer:3.33 m/s
Explanation:
Given
mass of Putty M=2 kg
the velocity of bob u=5 m/s
mass of doll m=1 kg
As there is no external force acting so linear momentum is conserved
Mu=(M+m)v
where v=common velocity of putty and doll after the impact
Answer:
Explanation:
The refractive index of sea water is more than refractive index of water . so when light passes from water to sea water or from low refractive index to high refractive index , ray of light bends towards the normal . This bending is very small because the difference in refractive index is very small.
