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yaroslaw [1]
3 years ago
11

What are the two forces that keep a pendulum swinging?

Physics
2 answers:
Pavel [41]3 years ago
7 0

Answer:

Tension force and the gravitational force

Explanation:

A simple pendulum consists of small metallic bob suspended with a string. It is fixed at one end and the bob is swinging. There are toe forces acting on the bob. One is the tension force away from the bob and the weight of the bob acting vertically downwards. The component of the weight acts as the restoring force.

Nezavi [6.7K]3 years ago
3 0
The force of gravity is the only force that keeps a pendulum in motion. both the force increases the speed of the pendulum on the downswing and decreases it's speed on its upswing.
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How long will it take to travel 200 km traveling 100m/s?
Damm [24]
Convert: 1km = 1000 m 200000 m * 0.01 s/m = 2000 s or 33 minutes and 20 seconds.
7 0
3 years ago
Two circular coils are concentric and lie in the same plane. The inner coil contains 170 turns of wire, has a radius of 0.0095 m
PIT_PIT [208]

Answer:

Current in outer circle will be 15.826 A

Explanation:

We have given number of turns in inner coil N_I=170

Radius of inner circle r_i=0.0095m

Current in the inner circle I_i=8.9A

Number of turns in outer circle N_o=150

Radius of outer circle r_o=0.015m

We have to find the current in outer circle so that net magnetic field will zero

For net magnetic field current must be in opposite direction as in inner circle

We know that magnetic field is given due to circular coil is given  by

B=\frac{N\mu _0I}{2r}

For net magnetic field zero

\frac{N_I\mu _0I_I}{2r_I}=\frac{N_O\mu _0I_0}{2r_O}

So \frac{170\times \mu _0\times 8.9}{2\times 0.0095}=\frac{150\times \mu _0I_O}{2\times 0.015}

I_O=15.92A

4 0
3 years ago
An ultrasonic tape measure uses frequencies above 20 MHz todetermine dimensions of structures such as buildings. It does so byem
ohaa [14]

Answer:  

a) 1m

b) 2μs

c) 3mm

Explanation:

3 0
3 years ago
How does the volume occupied by a cubic centimeter compare with the volume occupied by a millimeter
zimovet [89]
One cubic centimeter and one milliliter are equal volumes.
8 0
3 years ago
The human ear is sometimes called a Fourier analyzer. What does this mean and why is it an apt description? 1. Our ears can sort
tamaranim1 [39]

Answer:

1. Our ears can sort out the individual sine waves from a mixture of two or more sine waves, so we hear the pure tones that make up a complex tone.

Explanation:

A complex tone is a sound wave that consist of two or more forms of audible sound frequencies. Sound wave is a mechanical wave that is longitudinal, and could be represented by a sine wave because of it sinusoidal manner of propagation.

A Fourier analyzer can be used to differentiate individual sine waves from a combination of two or more of it; which is as the same function performed by human ear. To the human ear, a sound wave that consist of more than one sine wave will have perceptible harmonics which would be distorted and turn to a noise.

Thus, the human ear makes it possible to hear the pure tones that make up a complex tone.

6 0
3 years ago
Read 2 more answers
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