A girl 1.54m girl, is 30m away from tower whose height is 53.5m. determine the angel of angle of elevation from her eye to the t
2 answers:
Answer:
reference attached
Step-by-step explanation:
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<h3><u>Given </u><u>:</u><u>-</u></h3>
- The height of the girl is 1.54m
- The girl is 30m away from the tower
- Height of the tower is 53.5m
- We have to determine the angle of elevation from her eyes to the top of the tower
Refer the attachment
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Answer:
x^2 +y^2 = 4y
Step-by-step explanation:
Using the usual translation relations, we have ...
r^2 = x^2+y^2
x = r·cos(θ)
y = r·sin(θ)
Substituting for sin(θ) the equation becomes ...
r = 4sin(θ)
r = 4(y/r)
r^2 = 4y
Then, substituting for r^2 we get ...
x^2 +y^2 = 4y . . . . . matches the first choice
The formula of the kinetic energy is:
K.E =
mv²
The given are
K.E = 100 J
v = 5 m/s
Plug them in:
100 =m × (5)²
100 =m × 25
100 = 12.5m
Divide by 12.5 on either sides to isolate m
= 
12.5 and 12.5 cancels out
8 kg = m
The mass of the baseball that has a kinetic energy of 100 J and speed of 5 m/s is 8 kg
K.E =
The given are
K.E = 100 J
v = 5 m/s
Plug them in:
100 =
100 =
100 = 12.5m
Divide by 12.5 on either sides to isolate m
12.5 and 12.5 cancels out
8 kg = m
The mass of the baseball that has a kinetic energy of 100 J and speed of 5 m/s is 8 kg