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torisob [31]
3 years ago
5

If a 100 N net force act on a 50-kg car, what will the acceleration be

Physics
1 answer:
inna [77]3 years ago
7 0
Acceleration = force / mass.

A = 100/50 = 2 m/s^2 .
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The sound of a tuba is very low. Why?
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Answer:

When you blow into a tuba the air vibrates very slowly.​

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Due to absence of resonance in it , it produces music of lowest pitch , So when one blows into it the air column of the instrument vibrates very slowly producing low pitched sound.

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How does friction make it possible for you to walk across the floor?
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Hope those helps :)

5 0
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Una mujer de masa m está parada en el borde de una mesa giratoria horizontal de momento de inercia I y radio R. La mesa al princ
Dovator [93]

r

- \frac{mR^2 }{I  } \ vAnswer:

a)      w = - \frac{m r }{I} v  ,  b)   W = - ½ m_woman R² (1 + m_woman R / I²) v²

Explanation:

a) To solve this exercise, let's use the conservation of angular momentum.

We define a system formed by the table and the woman, therefore the torques are internal and the moment is conserved

initial instant. Before starting to move the woman

         L₀ = 0

final instant. After starting to move

         L_f = I w + m v r

the moment is preserved

        L₀ = L_f

         0 = Iw + m v r

         w = - \frac{m r }{I} v                    (1)

the direction of the angular velocity is opposite to the direction of the linear velocity, that is, counterclockwise

b) for this part we use the relationship between work and kinetic energy

        W = ΔK

in this case the initial speed is zero and the final speed of the table, using the relationship between linear and angular variables

         v = w r

we substitute

          W = 0 - ½ I_total w²

          I_total = I + m_{woman} R²

          W = - ½ (I + m_woman R²)  ( \frac{m_{woman} R}{I} \ v) ²

          W = - ½ (m_woman² R² + m_woman³ R³ / I²) v²

          W = - ½ m_woman R² (1 + m_woman R / I²) v²

3 0
3 years ago
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arrowRight . . . . a button on a computer keyboard that causes the cursor to move to the right on the screen when pushed

8 0
3 years ago
Read 2 more answers
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