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A body of mass 1 kg begins to move under...

A body of mass 1 kg begins to move under the action of a time dependent force `F=(2that(i)+3t^(2)hat(j))N, "where" hat(i)and hat(j)` are unit vector along x and y axis. What power will be developed by the force at the time?

A

`(2t^(3)+3t^(4)) W`

B

`(2t^(3)+3t^(5)) W`

C

`(2t^(2)+3t^(2)) W`

D

`(2t^(2)+3t^(4)) W`

Text Solution

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The correct Answer is:
B
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TARGET PUBLICATION-SCALARS AND VECTORS-Competitive Thinking
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  2. A force (4hat(i)+hat(j)-2hat(k))' N with velocity at (2(i)+2hat(j)+3h...

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  3. A body of mass 1 kg begins to move under the action of a time dependen...

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  4. When vec(A)*vec(B)=-|vec(A)||vec(B)|, then

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  5. The angle between the two vectors, (vec(A)=3hat(i)+4hatj+5hat(k)) and ...

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  6. The angle theta between the vector vec(p)=hat(i)+hat(j)+hat(k) and uni...

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  7. Angle between the vectors (hat(i)+hat(j))and (hat(j)-hat(k)) is

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  8. A particle moves in the x-y plane under the action of a force vecF suc...

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  9. In a triangle ABC, the sides AB and AC represented by the vector 3hat(...

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  10. In a clockwise system :-

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  11. For vectors vec(A) and vec(B) making an angle theta which one of the f...

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  12. A vector vec(A) points verically upward and vec(B) points towards nort...

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  13. Which of the following relation is not correct?

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  14. What is the value of linear velocity if vecomega = 3 hati - 4hatj + ha...

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  15. If vec(A)xxvec(B)=vec(B)xxvec(A), then the angle between vec(A) and ve...

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  16. The moment of the force, vec F = 4 hat i + 5 hat j - 6 hat k at (2,0,-...

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  17. A force vec F = prop hat i + 3 hat j + 6 hat k is acting at a point ve...

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  18. Two particles A and B are moving as shown in the figure. Their total a...

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  19. The velocity of a particle of mass m is vec(v) = 5 hat(i) + 4 hat(j) +...

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  20. Two adjacent sides of a parallelogram are respectively by the two vect...

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