Question

If I'm traveling at 56 mph and it takes me 90 meters to stop, what is my brake's deceleration in m/s/s? How far had I traveled in meters when I was traveling just half my original speed?

Answer 1

remember this

\[v _{f}^2 = v _{i}^2 + 2a \Delta x\]

Answer 2

Final velocity = 0 mi /h
Initial Velocity = 56 mi /h
distance = 90 m

Change the mi / h --> m/s first

Answer 3

Thanks!!!