Question #a85ff

1 Answer
Jun 10, 2015

Deltas=25m.

Explanation:

The law is:

s=s_0+v_0t+1/2at^2,

so:

s_5=0+7*5+1/2*4*5^2=85m is the position at the end of the 5th second,

s_4=0+7*4+1/2*4*4^2=60m is the position at the end of the 4th second,

so the distence run in the 5th second is Deltas=85m-60m=25m.