If F-60-15-3k- N and V-2-4-5k- m-s then instantaneous power is-

The correct option is B 45 wattInstantaneous power is P=F̅.v̅ P=F̅.v̅=(60î+15ĵ 3k̂).(2î 4ĵ+5k̂)=120 60 15=45W ∴ P=45W ...

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Household Electrification

If F⃗=60î+1...

Question

If $\to F = 60^i + 15^j - 3^k N$ and $\to V = 2^i - 4^j + 5^k m / s$ then instantaneous power is:

195 watt

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45 watt

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75 watt

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100 watt

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Solution

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\to F = (60^i + 15^j - 3^k) N

\to v = (2^i - 4^j + 5^k) m/s

\to F = (60^i + 15^j - 3^k) N

\to v = (2^i - 4^j + 5^k) m / s

\to F = (60^i + 15^j - 3^k) N

\to v = (2^i - 4^j + 5^k) m/s

2^i + 3^j + 2 k N

3^i + 4^j + 5^k m

10^j m / s^{2}

\to F = (2^i + 3^j + 5^k) N

t = 5

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