Table C: Average Speeds for Lower Racetrack Elapsed Time
Time (Initial)
(s)
Time (Final)
(s)
Average Speed
(m/s)
0.74
1st of the Track
2.07
2nd %% of the Track
1.09
1.40
3rd of the Track
0.95
1.61
Final 44 of the Track
0.81
1.81

4. 50x10= 500m/s 5. 52m/s

Lx bxh

Initial velocity,  u = 4.9 m/sfinal velocity = v m/sinitial height,  h₁ =  245 m    final height, h₂ = 0a = -9.8  m/s²time taken = t secondss = ut + 0.5at²⇒  (h₂-h₁) = ut + 0.5at²⇒  0-245 = 4.9t + 0.5×(-9.8)×t²⇒ -245 = 4.9t - 4.9t²⇒ 4.9t² -4.9t -245 =0solving it, we get   t = 7.59sv  = u +  at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/svelocity is  69.48 m/s downward

Answerit increases at a steady rate;