Question #bed07

1 Answer

Answer:

3.67 seconds.

Explanation:

First we need to convert those speeds to m/s.

#55 "miles"/h * (1609 m)/(1 "mile") * (1 h)/(3600 s) = 24.6 m/s#

#60 "miles"/h * (1609 m)/(1 "mile") * (1 h)/(3600 s) = 26.8 m/s#

Right 0.6#ms^-1# faster every second right. that's what acceleration is the change in velocity over a period of time or #a = (DeltaV)/t#

We know a which is 0.60#ms^-2#
So rearrange #a = (DeltaV)/t# for time,

#t = (DeltaV)/a# or
#t = ((26.8-24.6) m/s) /(0.6 m/s^2)# which = 3.67s