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natta225 [31]
3 years ago
9

(this is from my workbook)

Physics
2 answers:
inysia [295]3 years ago
7 0
I’m pretty sure it’s D. variable
Natasha2012 [34]3 years ago
3 0
Hypothesis I think. Hope this helped have a good day
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Physics help please! Offering 75 pts!
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Answer:

A

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List two of the number of strategies you have learned
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A 500 kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 30 N/m. The blo
m_a_m_a [10]

Answer:

x = 0.396 m

Explanation:

The best way to solve this problem is to divide it into two parts: one for the clash of the putty with the block and another when the system (putty + block) compresses it is   spring

Data the putty has a mass m1 and velocity vo1, the block has a mass m2 .  t's start using the moment to find the system speed.

Let's form a system consisting of putty and block; For this system the forces during the crash are internal and the moment is preserved. Let's write the moment before the crash

    p₀ = m1 v₀₁

Moment after shock

    p_{f} = (m1 + m2) v_{f}

   p₀ = p_{f}

   m1 v₀₁ = (m1 + m2) v_{f}

  v_{f} = v₀₁ m1 / (m1 + m2)

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With this speed the putty + block system compresses the spring, let's use energy conservation for this second part, write the mechanical energy before and after compressing the spring

Before compressing the spring

   Em₀ = K = ½ (m1 + m2) v_{f}²

After compressing the spring

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As there is no rubbing the energy is conserved

   Em₀ = E_{mf}

   ½ (m1 + m2) v_{f}² = = ½ k x²

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   x = 2.4 √ (11/3000)

   x = 0.396 m

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3 years ago
3 examples when friction is helpful?
Svetllana [295]
Some examples of when friction is helpful are: to help the movement of tires. When you walk, and also, when you erase. :)
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2 years ago
A rod of length 0.82 m, rotating with an angular speed, 4.2 rad/s, about axes that pass perpendicularly through one end, has a m
mariarad [96]

Answer:

Explanation:

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