How much net work is required to accelerate a 1200 kg car from 10\(ms^{-1}\) to 15\(ms^{-1}\)
a
1.95×\(10^5 j\)
b
1.35×\(10^4 j\)
c
7.5×\(10^4 j\)
d
6.0×\(10^4 j\)
Explanation
Correct Option
cVideo Explanation
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Discussions (15)
Odemosad
1 year ago
To find the net work required, we can use the work-energy theorem, which states that the net work done on an object is equal to the change in its kinetic energy.
work= 1/2m(v²-u²)
work= 1/2×1200×(15²−10²)
work = 600 × (225 -100)
work= 600 × 125
work= 7.5×10⁴J
Correct Option is C.
danis001
1 year ago
the guy explaining the answer is intelligent but He is too fast in doing calculations.
