A force of ( 7 i ^ + 6 k ^ ) N makes a body move on a rough plane with a velocity of ( 3 j ^ + 4 k ^ ) m s - 1 . The power (in watt) delivered by the force is

Question

A force of ( 7 i ^ + 6 k ^ ) N makes a body move on a rough plane with a velocity of ( 3 j ^ + 4 k ^ ) m s - 1 . The power (in watt) delivered by the force is, 24, 34, 21, 45

MARKS App · Accepted Answer

Power, P ⁡ = F → · v → ⇒ P = 7 i ^ + 6 k ^ . 3 j ^ + 4 k ^ = 24 W

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