Astudent slides a book across a desk, with a velocity of +8 m/s. when her friend catches the book, it has a velocity of +7.4 m/s. if the acceleration was a constant -5.6 m/s2, how wide is the desk? a. 0.05 m b. 0.60 m c. 0.83 m d. 1.65 m

Because acceleration was constant throughout the slide, we can show the slide lasted

Also because accleration was constant, we know the average velocity of the book was

Average velocity is also given by

so the width of the desk must have been

which means C is the most likely answer.

ill do it for 100, also this isnt 80 its 40

this is poiselle's equation from fluid mechanic in physics. mech eng