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Vesna [10]
3 years ago
7

How much momentum does a 77 kg football player have if he is running with a speed of 4 m/s

Physics
1 answer:
worty [1.4K]3 years ago
4 0

Answer:

308 N-s

Explanation:

Momentum is given by

P= mv

P= 77 x 4

P= 308

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Two skaters skate toward each other, each moving at 3.3 m/s. Their lines of motion are separated by a perpendicular distance of
vredina [299]

Answer:

4.4 rad/s

Explanation:

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Then their moments of inertia, given that their mass being 51 kg, is (treating them as point mass particle):

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E_L = E_r

2*(0.5Mv^2) = 2*(0.5I\omega^2)

\omega^2 = \frac{Mv^2}{I}

\omega = v\sqrt{\frac{M}{I}}

\omega = 3.3\sqrt{\frac{51}{38.25}} = 4.4 rad/s

3 0
3 years ago
How the number of batteries and the number of coils of wire affect the strength of an electromagnet.
mojhsa [17]
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I Hoped This Helped From My Knowledge And Have A Splendid Day ❤️❤️❤️
6 0
3 years ago
You hold a wire coil so that the plane of the coil is perpendicular to a magnetic field b⃗ . part a if the magnitude of b⃗ incre
larisa86 [58]
The correct answer is
<span>the flux increases because the magnitude of b increases.

In fact, the magnetic flux is given by
</span>\Phi_B = B A \cos \theta
<span>Where B is the intensity of the magnetic field, A the area enclosed by the coil and </span>\theta the angle between the direction of B and the perpendicular to the area A.
We can see that since in the problem the intensity of B increases, and the direction remains unchanged, then the magnetic flux increases as well.
8 0
3 years ago
Read 2 more answers
Why do different atoms or molecules preferentially absorb different wavelengths of light?
Paladinen [302]

Answer:

The electrons in an atom can only occupy certain allowed energy levels. ... Only certain energy levels are allowed, so only certain transitions are possible and hence specific wavelengths are emitted when an electron drops to a lower energy level.

6 0
3 years ago
If an object is stationary (not moving), what must the net force be equal to?
Brut [27]

Answer:

Firstly, we can state that the net force is the sum of all forces acting upon the object. Since the object is stationary, by Newton's First Law we can conclude that the sum of all forces acting upon a stationary object is 0 because there are no forces acting upon the object.

Explanation:

Please support my answer.

7 0
2 years ago
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