Question

Question #a85ff

Answer 1

`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`.