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A particle moves with a velocity 6hat(i)...

A particle moves with a velocity `6hat(i)-4hat(j)+3hat(k)m//s` under the influence of a constant force `vec(F)= 20hat(i)+15hat(j)-5hat(k)N`.
The instantaneous power applied to the particle is

A

`35 J//s`

B

`45 J//s`

C

`25 J//s`

D

`195 J//s`

Text Solution

Verified by Experts

The correct Answer is:
B
`P=vec(F).vec(v)= 20xx6+15xx(-4)+(-5)xx3`
`= 120-60-15= 120-75= 45 J//s`
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