A car travels 355 meters in 25 seconds. If it started at rest, find its acceleration.

What is 355 m?

1.   ?    Δt
2.   ?    Δx
3.   ?    a
4.   ?    v_i
5.   ?    v_f

A car travels 355 meters in 25 seconds. If it started at rest, find its acceleration.

Δx = 355 m

What is 25 sec?

1.   ?    Δt
2.   ?    Δx
3.   ?    a
4.   ?    v_i
5.   ?    v_f

A car travels 355 meters in 25 seconds. If it started at rest, find its acceleration.

Δx = 355 m
Δt = 25 sec

What variable is "started at rest"?

1.   ?    Δt
2.   ?    Δx
3.   ?    a
4.   ?    v_i
5.   ?    v_f

A car travels 355 meters in 25 seconds. If it started at rest, find its acceleration.

Δx = 355 m
Δt = 25 sec
v_i = 0 m/s

What are you looking for?

1.   ?    Δt
2.   ?    Δx
3.   ?    a
4.   ?    v_i
5.   ?    v_f

A car travels 355 meters in 25 seconds. If it started at rest, find its acceleration.

Δx = 355 m
Δt = 25 sec
v_i = 0 m/s
a = ?

Which equation can you use?

1.   ?    v_f = v_i + aΔt
2.   ?    Δx = v_iΔt + (½)a(Δt)²
3.   ?    v_f² = v_i² + 2aΔx
4.   ?    Δx = (½)(v_i + v_f)Δt