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
nordsb [41]
3 years ago
9

A 34-kg child on an 18-kg swing set swings back and forth through small angles. If the length of the very light supporting cable

s for the swing is 4.9 m, how long does it take for each complete back-and-forth swing? Assume that the child and swing set are very small compared to the length of the cables.
Physics
1 answer:
kompoz [17]3 years ago
5 0

Answer:

4.44s

Explanation:

A 34-kg child on an 18-kg swing set swings back and forth through small angles. If the length of the very light supporting cables for the swing is 4.9 m, how long does it take for each complete back-and-forth swing? Assume that the child and swing set are very small compared to the length of the cables

since the mass of the child and that of the swing is negligible, the masses wont be involved in the calculation

T=2π√L/g

g=acceleration due to gravity which is 9.81m/s2

the length of the supporting cable is 4.9m

T the period

period is the time required to make a complete oscillation

T=2*π√4.9/9.81

T=2*π*0.706

T=4.44s

4.44s

You might be interested in
Can you help me ASAPPP please help me
AveGali [126]

Answer:it is a

Explanation hope this helps .

6 0
4 years ago
PLEASE HELP! FOR BRAINLIEST!!!
Stells [14]

Answer:

I think it's C I'm so sorry if I'm wrong.

Explanation:

7 0
3 years ago
Read 2 more answers
A 0.500-nm x-ray photon is deected through 134 in a Compton scattering event. At what angle (with respect to the incident beam)
natita [175]

Answer:

The angle of recoil electron with respect to incident beam of photon is 22.90°.

Explanation:

Compton Scattering is the process of scattering of X-rays by a charge particle like electron.

The angle of the recoiling electron with respect to the incident beam is determine by the relation :

\cot\phi = (1+\frac{hf}{m_{e}c^{2}  })\tan\frac{\theta }{2}      ....(1)

Here ∅ is angle of recoil electron, θ is the scattered angle, h is Planck's constant, m_{e} is mass of electron, c is speed of light and f is the frequency of the x-ray photon.

We know that, f = c/λ      ......(2)

Here λ is wavelength of x-ray photon.

Rearrange equation (1) with the help of equation (1) in terms of  λ .

\cot\phi = (1+\frac{h}{m_{e}c\lambda  })\tan\frac{\theta }{2}

Substitute 6.6 x 10⁻³⁴ m² kg s⁻¹ for h, 9.1 x 10⁻³¹ kg for m_{e}, 3 x 10⁸ m/s for c, 0.500 x 10⁻⁹ m for λ  and 134° for θ in the above equation.

\cot\phi = (1+\frac{6.6\times10^{-34} }{9.1\times10^{-31}\times3\times10^{8}\times0.5\times10^{-9}  })\tan\frac{134 }{2}

\cot\phi=2.37

\phi = 22.90°

8 0
4 years ago
77. There is a 250-m-high cliff at Half Dome in Yosemite National Park in California. Suppose a boulder breaks loose from the to
lisabon 2012 [21]

Answer:70 m/s or 6.84 s

Explanation:

8 0
4 years ago
An open-topped freight car with mass 24,000 kg is coasting without friction along a level track. It is raining very hard, and th
skelet666 [1.2K]

Answer:

(a) v = 3..6 m/s

(b) The rain falling downward has been able to affect the horizontal motion of the car by reducing it's velocity from 4 m/s to 3.6 m/s.

Explanation:

from the question we have the following:

mass of the car (Mc) = 24,000 kg

initial velocity of the car (u) = 4 m/s

mass of water (Mw) = 3000 kg

final velocity of the car (v) = ?

(a) we can calculate the final momentum of the car by applying the conservation of momentum where

initial momentum = final momentum

Mc x U = (Mc + Mw) x V

24000 x 4 = (24000 + 3000) x v

96,000 = 27000v

v =3.6 m/s

(b) The rain falling downward has been able to affect the horizontal motion of the car by reducing it's velocity from 4 m/s to 3.6 m/s.

7 0
3 years ago
Other questions:
  • The energy levels the electron can occupy in the H atom can be calculated using the energy level equation. A H atom with an elec
    10·1 answer
  • 12. A 1.2-kg bucket of water is held by a string and spun in a horizontal circle with an acceleration of 24.6
    5·1 answer
  • Suppose an object’s initial velocity is 10 m/s and its final velocity is 4 m/s. Mass is constant.
    7·1 answer
  • What must be applied to move a load?
    9·2 answers
  • Write the letters of the correct answers on the lines at left.
    14·1 answer
  • Olivia noticed that it took 2s for a wave to pass by where she was swimming. What property of a wave did she measure?
    9·1 answer
  • An airplane pilot wishes to fly directly westward. According to the weather bureau, a wind of 75.0km/hour is blowing southward.
    7·1 answer
  • An electron is pushed into an electric field where it acquires a 1-V electrical potential. Suppose instead that two electrons ar
    12·1 answer
  • A person slides a box down a ramp. The box starts from rest 2m above the lowest point. The ramp is frictionless. Once the box re
    8·1 answer
  • You can tell if something’s a living thing or not by checking if it has?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!