a ball is droped from a height of 20m if the mass of the ball is 2 kg. calculate the (a)speed (b)kinetic energy of the ball just before it reaches the ground
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kinetic energy=mgh in this case(law of conservation of energy)
2×10×20
=400kg/m²
hope its correct!!
2×10×20
=400kg/m²
hope its correct!!
shubhammandor:
from were the 10 is came
this is formula which is used by you 8s potential energy
10 is the acceleration due to gravity....I used 10 for ease..
9.8 would be difficult
I know but as u wish
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speed is 396 and kinetic energy is 396000J
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