Question

PLEASE HELP DUE TONIGHT

Answer 1

1. The time taken for the water to fall that much is 0.2 s

2. The initial speed of the water is 4 m/s

1. How to determine the time

• Height (h) = 20 cm = 20 / 100 = 0.2 m
• Acceleration due to gravity (g) = 9.8 m/s²
• Time (t) =?

h = ½gt²

0.2 = ½ × 9.8 × t²

0.2 = 4.9 × t²

Divide both side by 4.9

t² = 0.2 / 4.9

Take the square root of both side

t = √(0.2 / 4.9)

t = 0.2 s

2. How to determine the initial speed

• Horizontal distance (s) = 80 cm = 80 / 100 = 0.8 m
• Time (t) = 0.2 s
• Initial speed (u) =?

s = ut

Divide both sides by t

u = s / t

u = 0.8 / 0.2

u = 4 m/s

Learn more about motion under gravity:

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