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Verizon [17]
3 years ago
12

Need help in the middle one

Physics
1 answer:
kondor19780726 [428]3 years ago
7 0

Answer:

Guysi hate math answer this guy plsss ssss

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A person carries a plank of wood 2 m long with one hand pushing down on it at one end with a force F1 and the other hand holding
sveta [45]

Answer:

F1= 588 N

F2= 784 N

Explanation:

Please see the attached file.

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4 years ago
Would it be correct to say the Doppler Effect is the apparent change in the speed of a wave due to the motion of the source?
tatiyna
Yes that would be correct. But if its an essay I'd be a bit more elaborate and give examples.
6 0
3 years ago
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4 0
3 years ago
Is telekinesis real??? I really wanna start learning it!
Lesechka [4]

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4 0
3 years ago
How much kinetic energy does a 7.2-kg dog need to make a vertical jump of 1.2 m?(gravity is 9.8)
Mekhanik [1.2K]
First, calculate the initial velocity of the dog given with the vertical height and the acceleration due to gravity which is calculated through the equation,
                         2ad = Vo²
Substituting the known values,
                           2(9.8 m/s²)(1.2 m) = V₀²
                                V₀ = 4.85 m/s
The kinetic energy is solved through the equation, 
                         KE = 0.5mv²
Substituting the known values to the latest equation,
                         KE = 0.5 (7.2 kg)(4.85 m/s)²
                          KE = 17.46 J
Thus, the kinetic energy is 17.46 J. 
8 0
3 years ago
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