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Jobisdone [24]
2 years ago
11

2.) Explain why the starting angle doesnt impact the time it takes the pendulum to swing back and forth?​

Physics
1 answer:
melomori [17]2 years ago
7 0

The starting angle θθ of a pendulum does not affect its period for θ<<1θ<<1. At higher angles, however, the period TT increases with increasing θθ.

The relation between TT and θθ can be derived by solving the equation of motion of the simple pendulum (from F=ma)

−gsinθ=lθ¨−gain⁡θ=lθ¨

For small angles, θ≪1,θ≪1, and hence sinθ≈θsin⁡θ≈θ. Hence,

θ¨=−glθθ¨=−glθ

This second-order differential equation can be solved to get θ=θ0cos(ωt),ω=gl−−√θ=θ0cos⁡(ωt),ω=gl. The period is thus T=2πω=2πlg−−√T=2πω=2πlg, which is independent of the starting angle θ0θ0.

For large angles, however, the above derivation is invalid. Without going into the derivation, the general expression of the period is T=2πlg−−√(1+θ2016+...)T=2πlg(1+θ0216+...). At large angles, the θ2016θ0216 term starts to grow big and cause 

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Why is a spectrum of colors produced when white light passes through a prism?
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Because each color is refracted differently, each bends at a different angle, resulting in a fanning out and separation of white light into the colors of the spectrum.

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They are adding steel components to the roof supports of the structure. We know that steel elongates when heated. At what temper
Andru [333]

Answer:

The change in temperature of 576.9°C will produce an elongation of 9 inches per feet in steel.

Explanation:

The formula for linear expansion of a material is:

ΔL = αLΔT

where, ΔL = change in length

             L = Original length

           ΔT = Change in temperature

             α = coefficient of linear expansion

For steel, α = 13 x 10^-6 /°C

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Therefore,

0.75 ft = (13 x 10^-6 /°C)(100 ft)ΔT

<u>ΔT = 576.9°C</u>

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8 0
3 years ago
For a movie stunt, an empty truck with a mass of 2000 kg goes 10 m/s and runs into a stopped car of mass 1000 kg. The truck then
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2 years ago
A fan converts 4.2 kJ of electrical energy to kinetic energy every minute. The power of the fan is...
miss Akunina [59]

The power of the fan is 70 Watt.

<h3 /><h3>What is power?</h3>

Power can be defined as the rate at which energy is used. The S.I unit of power is Watt (W)

The power of the fan can be calculated using the formula below.

<h3>Formula:</h3>
  • P = E/t.......................... Eqaution 1

<h3>Where:</h3>
  • P = Power of the fan
  • E = Energy of the fan
  • t = time

From the question,

<h3>Given:</h3>
  • E = 4.2 kJ = 4200 J
  • t = 1 minutes = 60 seconds.

Substitute these values into equation 1

  • P = 4200/60
  • P = 70 Watt.

Hence, The power of the fan is 70 Watt.

Learn more about power here: brainly.com/question/3631756

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