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jasenka [17]
2 years ago
9

A ball dropping from 70 cm took 0.6 seconds to travel a horizontal distance of 34 cm.

Physics
1 answer:
Alenkasestr [34]2 years ago
4 0

Answer:

vₓ = 0.566 m / s,   W_total = 9.1 J

Explanation:

This exercise is a parabolic type movement, for the x axis where there is no acceleration

         x = v t

         vₓ = x / t

         vₓ = 0.34 / 0.6

         vₓ = 0.566 m / s

the work done is

X axis

In this axis there is no acceleration, therefore the sum of the forces is zero and since the work is the force times the distance, we conclude that the lock in this axis is zero.

        W₁ = 0

Y axis  

in this axis the force that exists is the force of gravity, that is, the weight of the body

         W₂ = Fy y

         W₂ = mg and

          W₂ = m 9.8 0.70

          W₂ = m 9.1

the work is a scalar for which we have to add the quantities obtained

          W_total = W₁ + W₂

          W_total = 0 + 9.1 m

           W_total = 9.1 m

In order to complete the calculation, the mass of the body is needed if we assume that the mass is m = 1

           W_total = 9.1 J

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In February 2004, scientists at Purdue University used a highly sensitive technique to measure the mass of a vaccinia virus (the
OlgaM077 [116]

Answer:

a)   m_v = m_s ((\frac{w_o}{w})² - 1) ,  b)  m_v = 1.07 10⁻¹⁴ g

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a) The angular velocity of a simple harmonic motion is

           w² = k / m

where k is the spring constant and m is the mass of the oscillator

let's apply this expression to our case,

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          k = w² (m_v + m_s)

in the two expressions the constant k is the same and q as the one property of the silicon bar, let us equal

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N = 2<em>a</em>, H = 4<em>a</em>, O = 3<em>a</em>

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N = 2<em>b</em>, O = 2<em>c</em> + <em>d</em>, H = 2<em>d</em>

<em />

Now we solve the system of equations,

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<em />

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• <em>b</em> = 2

• <em>d</em> = 2×2 = 4

So, the balanced reaction is

2 NH₄NO₃   ⇒   2 N₂ + O₂ + 4 H₂O

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