Question

I need help with my chemistry homework

Answer 1

Speed in excess of 100 km/h, which is 208.8 km / h

Further explanation

Linear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration

• An equation of uniformly accelerated motion

`\large {\boxed {\bold {x=xo+vo.t+\frac {1} {2} at ^ 2}}}`

vt = vo + at

vt² = vo² + 2a (x-xo)

x = distance on t

vo / vi = initial speed

vt / vf = speed on t / final speed

a = acceleration

I think it's not chemistry but physics

Known

Δx = 290 m

vf = 0⇒stop

Δt = 10 s

We use the formula in the question

`\tt \Delta x=(1)/(2)(vf+vi)\Delta t\\\\290=(1)/(2)(0+vi).10\\\\vi=58~m/s=\boxed{\bold{208.8~km/h}}`