a particles of mass 0.5 kg travels in a straight line with velocity V is equal to 3 by 2 where is equals to 5 M minus 1 by 2 per second what is the work done by the net force during its displacement from x is equals to Zero 2 X is equals to 2 m
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11th
Physics
Work, Energy and Power
Work Energy Theorem
A body of mass 0.5 kg trave...
PHYSICS
A body of mass 0.5 kg travels in a straight line with velocity v=ax
3/2
where a=5 m
−1/2
s
−1
. The work done by the net force during its displacement from x = 0 to x = 2 m is
January 17, 2020avatar
Surender Khatri
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Velocity of body is given as v=ax
3/2
where a=5
Initial velocity of body v
i
∣
∣
∣
∣
∣
x=0
=5×0=0 m/s
Final velocity of body v
f
∣
∣
∣
∣
∣
x=2
=5×2
3/2
=10
2
m/s
From work-energy theorem, work done by the force is equal to change in kinetic energy of the body.
∴ W=
2
1
mv
f
2
−
2
1
mv
i
2
Or W=
2
1
(0.5)(10
2
)
2
−
2
1
(0.5)(0)
Or W=
2
1
(0.5)(200)−0
⟹ W=50 J
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