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A force (7 hat i + 6 hat k ) newton ma...

A force ` (7 hat i + 6 hat k ) ` newton makes a body move on a rough plane with a velocity of `(3 hat j + 4 hat k)`m/s. calculater power in watt.

A

15

B

18

C

24

D

32

Text Solution

Verified by Experts

The correct Answer is:
C
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What is the value of (hat i+hat j)×(hat j+hat k).(hat k+hat i) ?

Find a unit vector in direction of vec a-vec b , when vec a = 4 hat i + 7 hat j + hat k and vec b =3 hat j-11 hat k .

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