Question

A car goes at speed(v) of 20 m/s into a brick wall at distance 4 meters, give formula for v(t) before and after

Answer 1

Please help me

Answer 2

hold on, i'm looking through my notes

Answer 3

I'm having trouble figuring out how to find s(t).... sorry

Answer 4

\[v ^{2}=u ^{2}-2as\]

Answer 5

Given that it hit the wall, the final speed or v shall be 0.\[0^{2}=20^{2}-(2*a*4) \]

Answer 6

\[400=8a\]

Answer 7

And a=-50m/s^2