Answer:
88.89 cm/s or 0.89 m/s.
Explanation:
The following data were obtained from the question:
Initial velocity (u) = 0 cm/s
Distance travelled (s) = 120 cm
Time (t) = 2.7 s
Final velocity (v) =.?
The final velocity of the marble can be obtained as follow:
s = ½(v + u)t
120 = ½ × (v + 0) × 2.7
120 = (v + 0) × 1.35
120 = 1.35v + 0
120 = 1.35v
Divide both side by 1.35
v = 120/1.35
v = 88.89 cm/s
We may want to express the velocity in m/s. This can be obtained as follow:
100 cm/s = 1 m/s
Therefore,
88.89 cm/s = 88.89 cm/s × 1 m/s /100 cm/s
88.89 cm/s = 0.8889 m/s
88.89 cm/s = 0.89 m/s
Thus, the marble's final velocity is 88.89 cm/s or 0.89 m/s
