Obtain an expression fot K.E of …
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Posted by P Praveen 6 years ago
- 1 answers
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Gaurav Seth 6 years ago
We know that
v^2 = u^2 + 2aS
v= final velocity
u= initial velocity
a= acceleration due to gravity
S = displacement
S= (v^2 - u^2)÷2a
Work done= force * displacement
W = F * S
F= ma
W= ma * (v^2 - u^2)÷2a
W= 1/2 * m* (v^2-u^2)
If u=0 ( body starts from rest)
W= 1/2 * m * v^2=Kinetic energy
2Thank You