Sunday

November 23, 2014

November 23, 2014

Posted by **Miaow** on Sunday, September 2, 2012 at 11:58am.

A commuter backs her car out of her garage with an acceleration of 1.40 m/s2. (a) How long does it take her to reach a speed of 2.00 m/s? (b) If she then brakes to a stop in 0.800 s, what is her deceleration?

a.) V=Vo+at

2.00 m/s = 0 + 1.40 m/s^2t

t = 1.43 seconds

b.) acceleration = v/t

acceleration = (2.00 m/s)/8 s

deceleration = .25 m/s^2

- Physics -
**Henry**, Tuesday, September 4, 2012 at 4:40pma. Correct!

b. Dec. = (Vf-Vo)/t=(0-2) / 0.8=-2.5 m/s^2.

NOTE: Deceleration is always negative.

**Answer this Question**

**Related Questions**

physics - A commuter backs her car out of her garage with an acceleration of 1.6...

college physics - A commuter backs her car out of her garage with a constant ...

physics - A student driver backs his car out of his garage with an acceleration ...

physics - a power = work/time question. A broken car is being pushed to a garage...

Physics - A thief is trying to escape from a parking garage after completing a ...

Physics - As a traffic light turns green, a waiting car starts with a constant ...

Pre-Calc - Please check answer and help with one of them: 1. check please car in...

Pre-Calc - Please check answer and help with one of them: 1. check please car in...

Physics !! - 3)A car increases its speed from 5 m/s to 35 m/s in a distance of ...

Physics-Please check calculations - I posted this earler and you gave me help, ...