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3 years ago

If an object with a mass of 12 kilograms is moving at 10 meters per second, what is its momentum?

Physics

1 answer:

Varvara68 [4.7K]3 years ago

8 0

Answer:

120 kg.m/s

Explanation:

Momentum, p is given by the formula p=mv where m represent the mass of object in kgs while v is the velocity of the same object in m/s with direction aspect considered. In this case, the mass is given as 12 kg while velocity is 10 m/s hence momentum exerted will be 12*10= 120 kg.m/s

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A weightlifter is attempting a biceps curl with a 200 n barbell. the moment arm of the barbell about the elbow joint is 40 cm. t

CaHeK987 [17]

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3 years ago

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Nezavi [6.7K]

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Explanation:

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3 years ago

A force produces an acceleration of 5 ms

Dmitrij [34]

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3 years ago

distant galaxy emits light that has a wavelength of 434.1 nm. On earth, the wavelength of this light is measured to be 438.6 nm.

a_sh-v [17]

Answer:

The speed of the galaxy relative to the Earth is $3.09\times 10^6\ m/s$ .

Explanation:

We have,

(a) Wavelength emitted by light at distant galaxy is 434.1 nm. On earth, the wavelength of this light is measured to be 438.6 nm. It can be seen that the wavelength of light reduces as it reaches Earth. It is called Red shift. As per Doppler's effect, we can say that the galaxy is receding from the Earth.

(b) Let v is the speed of the galaxy relative to the Earth. It can be given by :

$v=c(\dfrac{\lambda'}{\lambda}-1)\\\\v=3\times 10^8\times (\dfrac{438.6 }{434.1 }-1)\\\\v=3\times 10^8\times (\dfrac{438.6}{434.1}-1)\\\\v=0.0103\cdot3\cdot10^{8}\\\\v=3.09\times 10^6\ m/s$

So, the speed of the galaxy relative to the Earth is $3.09\times 10^6\ m/s$ .

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3 years ago