Question

3) A book is being pushed along a table at constant velocity.
c. How does the Fpush compare to the Ff?
Please and thank you :)

Answer 1

what Ff??? that is F friction right??

Answer 2

yes!

Answer 3

if V is constant velocity , so acceleration is zero .
Bact to 2nd Newton's Law.., sigma Fex= ma.,

for a = 0;
sigmaFex = m a
sigmaFex = m. 0
sigmaFex = 0

where sigmaFex = Fpush - Ff

So

Fpush - Ff = 0
Fpush = Ff

Answer 4

why Ff is negative sign?? caused by Ff opposite direction with a Fpush

Answer 5

thank you!

Answer 6

ur welcome natasha ^^

Answer 7

:)