Velocity Question for a Car Accelerating Down a Road

[asdek]

Homework Statement

A car uniformly accelerates along a straight road, goes the distance between two points 240 m apart in 8 s. Its velocity as it passes the first point is 12 m/s. Find the acceleration of the car and its velocity as it passes the second point.

Relevant Equations

V=D/S

240/8=30.

 

[jbriggs444]

Problem Statement: A car uniformly accelerates along a straight road, goes the distance between two points 240 m apart in 8 s. Its velocity as it passes the first point is 12 m/s. Find the acceleration of the car and its velocity as it passes the second point.
Relevant Equations: V=D/S

240/8=30.

You seem to have calculated the car's average velocity. Is its velocity as it passes the first point above or below that average?

 

[asdek]

You seem to have calculated the car's average velocity. Is its velocity as it passes the first point above or below that average?

I'm sorry I don't understand, its velocity as it passes the first point is 12m/s. I'm not sure how to find out its velocity as it passes the secont point.

 

[jbriggs444]

I'm sorry I don't understand, its velocity as it passes the first point is 12m/s. I'm not sure how to find out its velocity as it passes the secont point.

I repeat:

You seem to have calculated the car's average velocity. Is its velocity as it passes the first point above or below that average?

 

[asdek]

I repeat:

You seem to have calculated the car's average velocity. Is its velocity as it passes the first point above or below that average?

Below?

 

[jbriggs444]

Below?

Yes. 12 m/s is less than 30 m/s.

We are told that the acceleration is uniform. Given this, will the velocity at the second endpoint be greater or less than 30 m/s?