## anonymous one year ago if your speed changes from 10 km/h tp 6 km/h you have a(n)_________acceleration.

• This Question is Open
1. anonymous

You need t, time of change to find acceleration. A= (Vf-Vi)/t . Without t, you need the distance it moved when changing speed then. and use T=d/(Vf-Vi) .

2. anonymous

i think the question is about the sign of the acceleration, if your velocity goes from a higher positive value to a lower positive one acceleration must be negative: $a=\frac{V_f-V_i}{\Delta t}=\frac{6-10}{\Delta t}=\frac{-4}{\Delta t}<0$ since the time variation $$\Delta t$$ is always positive!

3. anonymous

uh? But thats common sense tho/

4. anonymous

@Harry21 it is, i was just pointing out that the problem is not asking to find the acceleration value