The average speed of the football is 15 meters per second. Just divide both of the numbers by 4 :)
Answer:

Given:
Initial velocity (u) = 30 m/s
Final speed (v) = 0 m/s
Acceleration (a) = - 1.5 m/,s²
To Find:
Time in which train will come to rest (t).
Explanation:

So,
Time in which train will come to rest = 20 seconds
Answer:
1200 m
Explanation:
s= vt
s= 20m/s × 60 s
s= 1200 m
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It does not move because of the sun the sun has no energy.