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3 years ago

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A box of bananas weighing 40.0 n rests on a horizontal surface. The coefficient of static friction between the box and the surfa

ce is 0.40 and the coefficient of kinetic friction is 0.20.

1 answer:

e-lub [12.9K]3 years ago

3 0

Answer:

Explanation: The question seems incomplete. Check it well

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engineers are using computer models to study train collisions design safer train cars. They start by modeling an elastic collisi

Archy [21]

Answer:

The final velocity of the second car is 57 m/s south.

Explanation:

This is an elastic collision between two train cars. In this case, the total kinetic energy between the two bodies will remain the same.

The formula to apply is :

$m_1v_1i +m_2v_2i=m_1v_1f+m_2v_2f$

where ;

$m_1=mass of object 1\\v_1i=initial velocity object1\\m_2=mass of object2\\v_2i=initial velocity object 2\\v_1f=final velocity object 1\\v_2f=final velocity object 2$

Given in the question that;

$m_1=14650kg\\v_1i=18m/s\\m_2=3825kg\\v_2i=11m/s\\v_1f=6m/s\\v_2f=?$

Apply the formula as;

$m_1v_1i +m_2v_2i=m_1v_1f+m_2v_2f$

{14650*18}+{3825*11} = {14650 *6} + {3825 * v₂f}

263700+42075=87900 + 3825v₂f

305775 =87900 + 3825v₂f

305775-87900 = 3825v₂f

217875=3825v₂f

217875/3825 =v₂f

56.96 = v₂f

<u>57 m/s = v₂f { nearest whole number}</u>

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Find the momentum of a 25 kg remote

telo118 [61]

Answer:

100

Explanation:

Momentum (P) = Mass (M) × Velocity (V)

Momentum = 25kg × 4.0m/s

Momentum = 100kg m/s

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How is distance related to force in this experiment to mass

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When distance<span> is increased the amount of </span>force<span> needed will depend on the </span>mass<span> of the object. </span>

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A mole of red photons of wavelength 725 nm has ________ kj of energy.

yuradex [85]

According to the general rules and basic knowledge of physics, without any doubds I can say that a mole of red photons of wavelength 725 nm has [D] 165 kj of energy. I converted <span> a wavelength into energy in that way :
</span> $(E)= 6.023 x 10 ^23 x 6.625 x 10 ^ -34 x3 x 10^8/725x10^-9$ = $=0.1651 x10 ^ 6 J = 165 Kj.$ <span>
</span>

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A tape diagram. 0 dollars is 0 percent. Question mark dollars is 23 percent. 52 dollars is 100 percent. Jared has earned 23% of

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17.15 :)

rigt on ur mom

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