Question

#28 please

Answer 1

v = at
just use this formula consecutivly in everyinterval and u will find the final value at t=6

Answer 2

wait so do i have to muliply 6 by the sum of the acceleration values?

Answer 3

no

Answer 4

ok, wait i will do it for ya

Answer 5

thx :)

Answer 6

first interval 0<t<2
v(0) = 12
in this interval the a = 3,5 aproximatly, so final velocity is
v(2) = v(0) + at = 12 +3,5*2 = 19
so just continue like this till the end

Answer 7

sry, they ask you use left hand Rieman, so choose a = 4 instead of average

Answer 8

v(2) = v(0) + at = 12 +4*2 = 20

Answer 9

next would be:
v(4) = v(2) + at = 20 +3*2 = 26

Answer 10

so then v(4) = v(2)+3(4)?

Answer 11

no.
next next would be:
v(6) = v(4) + at = 26 +9*2 = 44

Answer 12

so you got it

Answer 13

ok, for ya?

Answer 14

yes thanks :)