Question

While traveling south on an expressway, a car traveling 60 mph (miles per hour) slows down to 30 mph in 12 minutes due to traffic conditions. Calculate the acceleration

Answer 1

I have a=-2.5 mi/hsquared S

Answer 2

Is my answer correct?

Answer 3

simple formula v = u - at
put v = 30 u = 60 t = 12*60

Answer 4

30=60(1-12a)

Answer 5

12a =.5

Answer 6

a = 1/24 =0.0416 in the negative x direction

Answer 7

that's the answer?

Answer 8

is my answer wrong ??

Answer 9

all the possible answers are whole numbers

Answer 10

then probably the answers are wrong because u and i both know that v = u-at is the formula unless any different condition is there in the question . so did u type the question correctly

Answer 11

no im i thought i saw periods sorry. the answers are -150 -6.0 -450 -2.5

Answer 12

oh ho !! got it . your answers are given in hours . i considered speed in miles/hour but time i made it in seconds !!

Answer 13

correct ans 30 = 60 - 12a
a = 30/12 = 2.5 in negative x direction

Answer 14

no im i thought i saw periods sorry. the answers are -150 -6.0 -450 -2.5

Answer 15

uff !! i am again wrong
correct ans 30 = 60 - 12/60a
a = 30* 60/12 = 150 mi/h^2

Answer 16

this time i really got the ans .. after dividing 12/60 i just converted 12min in hours

Answer 17

which one would it be out of those 4?

Answer 18

-150

Answer 19

thanks