A new driver is speeding at 30m/s and sees the blue light of law enforcement in the distance and decides to slow down so he will not get a ticket. He taps the brakes and is soon going 25 m/s. If it took him 3s to do this what was his acceleration?

-1.6667 m/s2

Here is the Formula:

a = (v_f - v_i) / Δt,

His acceleration was 5.468 ft/s3 .

Explanation:

Here is how I got the answer

1. a = (v_f - v_i) / Δt,

2. a = 2 * (Δd - v_i * Δt) / Δt²,

3. a = F / m,

3. dark matter

empty space could also be a simple vacuum

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j