Question

Mariam driving at a speed of 20.0 / applies brakes close to a signal and travels a distance of 200 before coming to rest. What was her acceleration?

Answer 1

Answer:

-1

Explanation:

v=0 since lastly it stopped.

u = 20 given

S = 200 given

Formula to be used...

v^2=u^2 + 2aS

0 = 400 + 400a

a = -1

Negative sign shows that body is retardating