Aforce f at an angle θ above the horizontal is used to pull a heavy suitcase of weight mg a distance d along a level floor at constant velocity. the coefficient of friction between the floor and the suitcase is μ. the work done by the frictional force is ) -fd cos θ (b) - µ fd cos θ (c) -µmgd (d) -µ mgd cos θ

Work done

So option (d) will be correct option

Explanation:

We have given that applied force is F

Angle above the horizontal is

Coefficient of friction is

So frictional force will be equal to

Distance is given as d

Work done is equal to ( Negative direction is due to frictional force as it is a opposing force )

So work done

So option (d) will be correct option

gans

explanation:

vestigial organs (like your appendix) are organs that no longer serve a purpose.

i dont think you are wrong for wanting to get even with someone who did you wrong.

(i'm an eye for an eye kind of person) but if this person hurt you in a sexual way, i dont suggest doing anything to him. he should be taken to the proper authorities, you could go to jail depending on what you do. if it was something small like your sibling took your spot on the couch, than yea, i would get even with him by taking one of his favorite snacks lol. but i dont suggest you doing anything illegal.