Answer:
The distance close to the sidewalk can the flower pot fall is
x = 14.83 m
Explanation:
Given
Δt = 0.300 s
d = 19.6 m
h = 1.79 m
Knowing as the velocity of the sound as a 330 m/s
t = (19.6 - 1.79)m / 330 m/s
t = 0.0539 s
Total time
tₙ = 0.3 + 0.0539 = 0.3539 s
Time for flower-pot
s = ¹/₂ * g * t²
tₐ = √[(2 * 17.81m)/9.81m/s²]
tₐ = 1.34 s, t' = 0.3539
1.34 - 0.3539 = 0.9861 s
19.6 m - x = ¹/₂* g * t ²
x = 19.6 - ¹/₂ * (9.81) * (0.9861)²
x = 14.83 m
Take your 23.4 cm^2 .
Multiply it by
(1 meter / 100 cm) ^2 .
If you handle all of the units correctly,
you'll end up with 0.00234 m^2 .
Answer:
The minimum speed when she leave the ground is 6.10 m/s.
Explanation:
Given that,
Horizontal velocity = 1.4 m/s
Height = 1.8 m
We need to calculate the minimum speed must she leave the ground
Using conservation of energy
Put the value into the formula
Hence, The minimum speed when she leave the ground is 6.10 m/s.
Rubber,Plastic,I think thats it but everyone that can float has a high buoyancy