How to Calculate Acceleration for a Car Speeding from 10m/s to 15m/s in 80m"

[Oceanspire]

1. What acceleration would be needed by a car speeding up from 10 m/s to 15 m/s in 80 m?2. The equations I have at my use right now are:
V = at
D = (1/2)(a)(t)^2
T = square root of 2D / A
A = change in velocity / time3. I honestly can't wrap my mind around how to solve this

 

[ehild]

1. What acceleration would be needed by a car speeding up from 10 m/s to 15 m/s in 80 m?2. The equations I have at my use right now are:
V = at
D = (1/2)(a)(t)^2
T = square root of 2D / A
A = change in velocity / time3. I honestly can't wrap my mind around how to solve this

Welcome to PF!

Your equations are valid when the initial velocity is zero. It is not the case in the problem.

 

[Antonius]

Can't you use vf2 = vi2 + 2ad ?

You have vf, vi, d, and now you will have to find a.

:)

 

[SammyS]

Can't you use vf = vi + 2ad ?

You have vf, vi, d, and now you will have to find a.

:)

Don't you need to square those velocities ?

 

[Antonius]

Don't you need to square those velocities ?

Don't you need to square those velocities ?

sorry
i edited it now (Y)