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MrRissso [65]
3 years ago
6

The person in the middle weighs 500 n, and the tension on the rope is 400 n. what is the weight of the scaffolding?

Physics
1 answer:
Alina [70]3 years ago
7 0

Typically a scaffolding has two ropes to support it. One on the left most side while the other one is on the right most side. Based on equilibrium rule, the summation of forces must be 0. The downward force is the weight of person and scaffolding, while the upward force are the tensions on the two ropes, hence:

Weight person + Weight scaffolding = 2 * Tension

500 N + Weight scaffolding = 2 * 400 N

Weight scaffolding = 300 N

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A cannon fires a 40.5kg shell toward a target and the shell moves with a velocity of 120 m/s. Calculate the shells momentum
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1. A hydraulic lift is to be used to lift a truck masses 5000 kg. If the diameter of the
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a)   F = 4.9 10⁴ N,  b)   F₁ = 122.5 N

Explanation:

To solve this problem we use that the pressure is transmitted throughout the entire fluid, being the same for the same height

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           P = F / A

to lift the weight of the truck the force of the piston must be equal to the weight of the truck

          ∑F = 0

          F-W = 0

          F = W = mg

          F = 5000 9.8

          F = 4.9 10⁴ N

the area of ​​the pisto is

          A = pi r²

          A = pi d² / 4

          A = pi 1 ^ 2/4

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          P = 4.9 104 / 0.7854

          P = 3.85 104 Pa

2) Let's find a point with the same height on the two pistons, the pressure is the same

          \frac{F_1}{A_1} = \frac{F_2}{A_2}

where subscript 1 is for the small piston and subscript 2 is for the large piston

          F₁ = \frac{A_1}{A_2} \ F_2

the force applied must be equal to the weight of the truck

          F₁ = ( \frac{d_1}{d_2} )^2\  m g

          F₁ = (0.05 / 1) ² 5000 9.8

          F₁ = 122.5 N

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