Calculating Distance Traveled During a 5-Minute Bus Acceleration | Homework Help

[licorice]

Homework Statement

A bus accelerates from 85 km/hr to 105 km/hr on the road. he accelerates for a period of 5 min. how long has he traveled over that period of time?

Homework Equations

x=1/2(v2=v1)t

The Attempt at a Solution

I am not sure if this is the right equation to use, i get stuck once i plug in the numbers while doing the algebra, and is the mass really needed? It states the weight of the car in the question?

which one is v1 and v2? how do i tell?

 

[CheckMate]

The mass doesn't matter since both the initial speed and final speed are given. Assuming the acceleration is constant it should be (v2-v1)/t

d=vt+(1/2)(a)t^2

Then you know what to do next.

 

[licorice]

The mass doesn't matter since both the initial speed and final speed are given. Assuming the acceleration is constant it should be (v2-v1)/t

d=vt+(1/2)(a)t^2

Then you know what to do next.

which one is Acceleration or Time if acceleration says its 5 min?

 

[zgozvrm]

which one is v1 and v2? how do i tell?

V1 is the initial, or starting speed (usually called [itex]v_i[/tex])<br /> V2 is the final speed (usually called [itex]v_f[/tex])[/itex][/itex]

 

[zgozvrm]

The mass doesn't matter since both the initial speed and final speed are given. Assuming the acceleration is constant it should be (v2-v1)/t

d=vt+(1/2)(a)t^2

Then you know what to do next.

Although this will work, you don't really need to find the acceleration (and it is constant), just use the basic kinematic equation:

$$d = \frac{v_i + v_f}{2}\cdot t$$

 

[Integral]

Be sure that the units of time agrees with the time units used for velocity.