مشاهدة النسخة كاملة : Advanced Problem 3


hatemT
27-04-2011, 06:28 AM
Which of the following is true
a)If a car is traveling eastward its acceleration is eastward.
b) If a car is slowing down, its acceleration must be negative.
c) A particle with constant acceleration can never stop and stay stopped.

Asa7be Wawa
27-04-2011, 05:18 PM
Answer is B

hatemT
27-04-2011, 11:28 PM
Wrong I'll giev you another chance , before Answering
Try Again
CONCENTRATE

hatemT
27-04-2011, 11:35 PM
The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with an acceleration of 5.60 m/s2 for 4.20 s, making straight skid marks 62.4 m long ending at the tree.
With what speed does the car then strike the tree?

BaSiL NaSR
12-01-2012, 06:15 AM
Hi i think they are all true

kimo_medo2008
28-03-2012, 12:42 AM
Answer is b , c

c.ronaldo122
06-12-2013, 07:52 AM
Answer is B