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3 years ago

9

A ball hits the wall what is true about the magnitude of the force experienced by the ball compared to the force experienced by

the wall

2 answers:

mash [69]3 years ago

8 0

<span>Newtons Third Law of Motion: for every action there is an equal and opposite reaction. I think

</span>

barxatty [35]3 years ago

3 0

<span>Newtons Third Law of Motion for every action there is an equal and opposite reaction</span>

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A spiral spring of natural length 20.00cm has a scale

iVinArrow [24]

The mass of the scale pan : 0.11 kg

<h3>Further explanation</h3>

Given

A spiral spring's length = 20 cm

mass 50 g ⇒ the length = 22 cm

mass 70 g ⇒ the length = 22.25 cm

Required

the mass of the scale pan

Solution

Hooke's Law :

$\tt F=k.\Delta x$

The spring constant (k) :

$\tt k=\dfrac{\Delta F}{\Delta x}=\dfrac{g.(70-50)}{22.25-22}=\dfrac{g.20}{0.25}=g.80~g/cm=10~m/s^2\times 8~kg/m=80~N/m$

mass of the scale pan=m(for 50 g mass) :

$\tt (m+0.05).g=80\times (0.22-0.20)\\\\m=0.11~kg$

4 0

3 years ago

A train car of mass 3,825 kg sits at rest on the track. A second car of mass 5,169 kg moving at 6 m/s slams into it and they sti

Anni [7]

The final combined speed of the two trains is 3.4 m/s

Explanation:

We can solve this problem by using the law of conservation of momentum: in absence of external forces, the total momentum of the two trains must be conserved before and after the collision.

Therefore we can write:

$p_i = p_f\\m_1 u_1 + m_2 u_2 = (m_1+m_2)v$

where:

$m_1 = 3,825 kg$ is the mass of the first train

$u_1 = 0 m/s$ is the initial velocity of the first train, which is at rest

$m_2 = 5,169 kg$ is the mass of the second train

$u_2 = 6 m/s$ is the initial velocity of the second train

$v$ is the final combined velocity of the two trains after the collision

We can now solve the equation for v, to find the final combined velocity of the two trains:

$v=\frac{m_1 u_1 + m_2 u_2}{m_1+m_2}=\frac{0+(5169)(6)}{3825+5169}=3.4 m/s$

So, the final combined speed is 3.4 m/s.

Learn more about momentum here:

brainly.com/question/7973509

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#LearnwithBrainly

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3 years ago

Which statement is a result of a substance melting. A) The attractions between the particles are stronger. B) The average kineti

Alex73 [517]

the answer is D) on usatestprep

5 0

4 years ago

Read 2 more answers

U WILL GET 25 POINTS PLEASE HELP

balandron [24]

Answer:

Hopefully, this is right.

Explanation:

Answer is 5.43.

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3 years ago

The strength of a magnetic field is an indication of how many flux lines per square inch there are. This is called

Nat2105 [25]

Answer:

gauss

Explanation:

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3 years ago