Thursday

August 28, 2014

August 28, 2014

Posted by **Anonymous** on Wednesday, December 7, 2011 at 8:35pm.

- geometry -
**Reiny**, Wednesday, December 7, 2011 at 8:49pmLet the acceleration (really deceleration) be a

so v = at + c

when t=0 , v = 30

30 = 0 + c, --> c=30

so v = at + 30

when t=2, v = 16

16 = 2a + 30

2a = -14

a = -7

v = -7t + 30

- geometry -
**Reiny**, Wednesday, December 7, 2011 at 8:53pmI just solved your question using Calculus, but I am not sure if you know Calculus, so ....

Treat your data two ordered pairs (0,30) and (2,16)

where the first coordinate is time and the second is velocity

slope = (30-16)/(0-2) = -7

so v = -7t + b , using the old y = mx + b format

but (0,30) must satisfy this

30 = 0 + b

b = 30

so v = -7t + 30 , as before

**Related Questions**

algebra - The formula below can be used to find the distances (d) traveled by an...

algebra - The formula below can be used to find the distance (d) traveled by an ...

Physics - A car slowed down at a constant rate from 32meters per second to 3.0 ...

algebra 1 - A ball is tossed upward with an initial velocity of 14.2 meters per ...

physics - A bicyclist moving at a constant speed takes 10.0 seconds to travel ...

Calculus - A team has been working to convert diesel-powered cars to run just as...

math - a car traveling on a straight road at 20 meters per second accelerates to...

Math - A team has been working to convert diesel-powered cars to run just as ...

calculus - A team has been working to convert diesel-powered cars to run just as...

physics - How would I find the acceleration of a car if it traveled 1.5 meters ...