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If vec(a)=m vec(b)+vec(c ). The scalar m...

If `vec(a)=m vec(b)+vec(c )`. The scalar m is

A

`(vec(a).vec(b)-vec(b).vec(c ))/(b^(2))`

B

`(vec(c ).vec(b)-vec(a).vec(c ))/(a^(2))`

C

`(vec(c ).vec(a)-vec(b).vec(c ))/(c^(2))`

D

`(vec(a).vec(b)-vec(b).vec(c ))/(a^(2))`

Text Solution

Verified by Experts

The correct Answer is:
A
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AAKASH SERIES-WORK POWER ENERGY-EXERCISE - 1A
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  2. If vec(A)+vec(B)=vec(C ), then magnitude of vec(B) is

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  3. If vec(a)=m vec(b)+vec(c ). The scalar m is

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  4. Choose the false statement

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  5. Three vectors satisfy the relation vec(A).vec(B)=0 and vec(A).vec(C )=...

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  6. Let vec(F) be the force acting on a particle having position vector ve...

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  7. The area under a .force - displacement. curve gives :

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  8. The work done by gravity in lifting a body to a certain height depends...

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  9. When a body is falling freely from some height work done by gravity is

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  10. A man is waiting at a bus stop by holding a box on his head. Work done...

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  11. A block of mass .m. is pulled by a force .F. on a level surface throug...

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  12. In the case of conservative force

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  13. Two identical bodies of same mass are raised to same heights by two pe...

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  14. Two bodies of different masses have same linear momentum. The one havi...

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  15. Two bodies of different masses have same K.E. The one having more mome...

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  16. The total workdone on a particle is equal to change in it.s kinetic en...

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  17. Two bodies of masses m, and m, have equal momentum. Their K.E. are in ...

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  18. A particle moves along a circle with acceleration of constant magnitud...

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  19. Two springs have their force constants k(1) and k(2) and they are stre...

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  20. A lorry and a car moving with same KE are brought to rest by applying ...

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