1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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 

You might be interested in
Explain the relationship between motion and frame of reference.
elena-14-01-66 [18.8K]
Force is the agent which causes a change in the velocity of an object and thereby to acellerate it inertia on he other hand is a property which realtes to an intrinsic of a body  to resist any change in its state rest or of emotion uniform or non uniform 

6 0
3 years ago
Determine the quantity of work done when a crane lifts a 100-N block from 2m above the ground to 6m above the ground
Sedaia [141]
You can use the formula:
Work = Force × Distance
W = 100 * (6 - 2)
W = 100 * 4
W = 400 J

hope this helps :)
7 0
3 years ago
A hydraulic cylinder on an industrial machine pushes a steel block a distance of x feet (0 ≤ x ≤ 6), where the variable force re
strojnjashka [21]

Answer:

W = 1080.914 J

Explanation:

f(x) = 1100xe⁻ˣ

Work done by a variable force moving through a particular distance

W = ∫ f(x) dx (with the integral evaluated between the interval that the force moves through)

W = ∫⁶₀ 1100xe⁻ˣ dx

W = 1100 ∫⁶₀ xe⁻ˣ dx

But the integral can only be evaluated using integration by parts.

∫ xe⁻ˣ dx

∫ vdu = uv - ∫udv

v = x

(dv/dx) = 1

dv = dx

du = e⁻ˣ dx

∫ du = ∫ e⁻ˣ dx

u = -e⁻ˣ

∫ vdu = uv - ∫udv

∫ xe⁻ˣ dx = (-e⁻ˣ)(x) - ∫ (-e⁻ˣ)(dx)

= -xe⁻ˣ - e⁻ˣ = -e⁻ˣ (x + 1)

∫ xe⁻ˣ dx = -e⁻ˣ (x + 1) + C (where c = constant of integration)

W = 1100 ∫⁶₀ xe⁻ˣ dx

W = 1100 [-e⁻ˣ (x + 1)]⁶₀

W = 1100 [-e⁻⁶ (6 + 1)] - [-e⁰ (0 + 1)]

W = 1100 [-0.0173512652 + 1]

W = 1100 × (0.9826487348)

W = 1080.914 J

Hope this Helps!!!

5 0
3 years ago
An ambulance is rapidly approaching you at a stop light. What happens to the frequency and pitch of the sound as the ambulance d
vagabundo [1.1K]

Answer:

A )

Explanation:

This change in frequency observation occur due to doppler effect

if the wave source moves,In the time between one wave peak being emitted and the next, the source will have moved so that the shells will no longer be concentric. The wavefronts will get closer together in front of the source as it travels and will be further apart behind it.  (see the graph)

when the person standing still in front of the ambulance, he will observe a <em>higher frequency </em>than before as the source travels towards them.

f_(observed)=\frac{V_(wave)}{V_(wave)-V_(source)} *f_(original)

The pitch we hear depends on the frequency of the sound wave.

A high frequency corresponds to a high pitch

as we hear a higher frequency , it makes the <em>pitch higher</em> too

5 0
3 years ago
Read 2 more answers
A 7300N elevator is to be given an acceleration of 0.150g by connecting it to a cable of negligible weight wrapped around a turn
Nata [24]

Answer:

The value is  \alpha  = 24.5 \  rad/s^2

Explanation:

From the question we are told that

  The weight of the elevator is W =  7300 \  N

  The acceleration it is to be given is  a =  0.150 \ g  =  0.150 *  9.8  = 1.47 \  m/s^2

  The diameter of the shaft is d =  12.0 \ cm  =  0.12 \  m

Generally the radius is mathematically represented as

      r =  \frac{d}{2}

=>   r =  \frac{0.12}{2}

=>   r =  0.06 \ m

Generally the minimum angular acceleration is mathematically represented as

       \alpha  =  \frac{a}{r}

=>    \alpha  =  \frac{1.47}{0.06}

=>    \alpha  = 24.5 \  rad/s^2

7 0
3 years ago
Other questions:
  • Can a plane mirror produce a real image? Explain.
    10·1 answer
  • When two waves meet they combine according to the ____________________ principle?
    14·1 answer
  • Block 1, of mass m₁ = 1.30 kg , moves along a frictionless air track with speed v₁ = 29.0 m/s. It collides with block 2, of mass
    13·1 answer
  • The slope on a distance-time graph shows a ball moving from 20 m to 40 m in 1 s and from 40 m to 80 m in the next second
    6·1 answer
  • A small rock is thrown vertically upward with a speed of 22.0 m/s from the edge of the roof of a 30.0-m-tall building. The rock
    8·1 answer
  • A thermometer is placed in water in order to measure the water’s temperature. What would cause the liquid in the thermometer to
    7·2 answers
  • When a puddle of water evaporates, does the water change into a new kind of matter
    12·1 answer
  • How can the continuous addition of heat in a closed system cause it to explode?
    15·2 answers
  • ____ is a chemical messenger released by virus infected cells
    10·1 answer
  • Explain why an egg thrown at a concrete wall will break, but an egg thrown at a sheet hanging from the ceiling will not. (Be sur
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!