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bija089 [108]
3 years ago
13

When a pendulum is swinging, the velocity is highest at which point?

Physics
2 answers:
strojnjashka [21]3 years ago
7 0
<h2>Answer:</h2>

<u>The velocity is highest </u><u>at the center, when the bob is hanging straight down </u>

<h2>Explanation:</h2>

As the pendulum swings to its highest position, its kinetic energy decreases to 0 on both right and left sides. If we tie a string to an object and let it swing back and forth, we will see that object’s velocity is 0 m/s at the highest points on the left and right sides and it is highest at at the center, when the bob is hanging straight down due to gravitational pull and the stored potential energy.

balu736 [363]3 years ago
4 0

Answer:

The velocity is highest at the lowest point of the trajectory

Explanation:

We can answer the question by applying the law of conservation of energy. In fact, neglecting friction and air resistance, the mechanical energy of the pendulum is constant during the motion:

E=K+U=const.

where:

K=\frac{1}{2}mv^2 is the kinetic energy, with m being the mass of the pendulum and v the velocity

U=mgh is the potential energy, with g being the acceleration due to gravity and h the heigth of the pendulum with respect to the lowest position

Since E must remain constant, we see that when K is maximum, U is minimum, and viceversa. This also means that when the velocity (v) is maximum, then the height (h) is minimum, so the pendulum must be at its lowest point.

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What is the relationship between wavelength of light and the quantity of energy per photon?
slamgirl [31]

Answer:

The quantity of energy per photon is inversely proportional to the wavelength of the light.

Explanation:

Energy of light is given as

E = hf

where E = energy of the photons,

f = frequency of the light

If the number of photons = n

(E/n) = (h/n) f

Let (E/n) = E'

(h/n) = h'

But the frequency of light is related to wavelength through the relation

v = fλ

where v = speed of light = c

λ = wavelength of light

f = (c/λ)

E' = h' f

Substituting for f

E' = h' (c/λ)

h' and c are both constants, h'×c = K

E' = (K/λ)

So, the quantity of energy per photon is inversely proportional to the wavelength of the light.

Hope this Helps!!!

3 0
3 years ago
Read 2 more answers
6000 kg train moving 5 m/sec to east collides with 5000 kg train moving 3 m/sec to west. What is their velocity
Svetlanka [38]

The final velocity is 1.37 m/s east

Explanation:

We can solve this problem by using the law of conservation of momentum: in fact, in absence of external forces, the total momentum of the two trains must be conserved before and after the collision.

So we can write:

p_i = p_f\\m_1 u_1 + m_2 u_2 = (m_1+m_2)v

where:

m_1 = 6000 kg is the mass of the first train

u_1 = 5 m/s is the initial velocity of the first train (we take east as positive direction)

m_2 = 5000 kg is the mass of the second train

u_2 = -3 m/s is the initial velocity of the second train

v is the final combined velocity of the two trains

Re-arranging the equation and substituting the values, we find:

v=\frac{m_1 u_1 + m_2 u_2}{m_1+m_2}=\frac{(6000)(5)+(5000)(-3)}{6000+5000}=1.37 m/s

And the positive sign indicates their final direction is east.

Learn more about momentum here:

brainly.com/question/7973509

brainly.com/question/6573742

brainly.com/question/2370982

brainly.com/question/9484203

#LearnwithBrainly

8 0
3 years ago
What are the order of the 7 prefixes you are required to know in order from largest to smallest
vaieri [72.5K]
10^9 giga, 10^6 mega, 10^3 kilo, 10^-3 milli, 10^-6 micro, 10^-9 nano, 10^-12 pico
Potentially they might want centi which is 10^-2
7 0
3 years ago
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Tara is an electrician. Which field of science does Tara need to know the most about in order to do her job?
katovenus [111]
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What is the weight of an object (mass = 60 kilograms) on Mars, where the acceleration due to gravity is 3.75 meters/second2?. Se
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Weight = mass * gravity = 60 kg * 3.75 m/s² = 225 N

<span>Option D.</span>
5 0
3 years ago
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