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3 years ago

Under what conditions would a rope remain in equilibrium during a tug of war

Physics

2 answers:

Andrei [34K]3 years ago

7 0

<h3>Answer;</h3>

B) When the net force acting on the rope is zero.

<h3><u>Explanation;</u></h3>

<u><em>Equilibrium refers to a state of balance where there is no net force. The forces acting at point in equilibrium are opposite and equal.</em></u>
<u><em>Therefore, for a body at equilibrium the vector sum of all the forces acting on that body must be zero and also the vector sum of torques on the body must be zero</em></u>.
<em><u>In a tug of war for example, the equilibrium will be achieved if the two teams involved on either side apply equal forces in opposite direction, such that there will be no net force on the rope, that is the net force on the rope is zero.</u></em>

miskamm [114]3 years ago

3 0

When the teams on each end of the rope exert exactly the
same force ... in opposite directions ... the net force on the
rope is zero, and it doesn't accelerate in either direction.

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A roller coaster car starts from rest at the top of a hill 15 m high and rolls down to ground level. From there it starts into a

Softa [21]

Answer:

955.5N

Explanation:

The normal force is given by the difference between the centripetal force and gravity at the top of the loop:

$F_N = F_C - F_G = m\frac{v^{2} }{r} - mg$

mass m = 65kg

radius of the loop r = 4m

velocity v = ?

g = 9.8 m/s²

To find the centripetal force, you need to find the velocity of the car at the top of the loop.

Use energy conservation:

$E_{tot}=mgh + \frac{1}{2} mv^{2}$

At the top of the hill:

$E_{tot}= mgh_{hill}$

At the top of the loop:

$E_{tot}=mgh_{loo}_p +\frac{1}{2} m v^{2}$

Setting both energies equal and canceling the mass m gives:

$gh_{hill} = gh_{loo}_p + \frac{1}{2} v^{2}$

Solving for v:

$v^{2} = 2g(h_{hill}-h_{loo}_p)$

Using v in the first equation:

$F_N = \frac{2mg(h_{hill}-h_{loo}_p)}{r} - mg$

$F_N = 955.5N$

7 0

3 years ago

Scientific evidence documents the pattern of evolution. The evidence exists in a variety of categories. What are these categorie

Sauron [17]

Answer:

Explanation:

Scientific evidence takes note of the pattern of evolution. The evidence exists in a variety of categories, including direct observation of evolutionary change, the fossil record, homology, and biogeography.

Examples of the categories with their respective examples are:

Direct observation of evolutionary change: Development of drug resistant bacteria

Fossil record: Discovery of transitional forms of horses, Discovery of shells of extinct species

Homology: Similarities in mammalian forelimbs, Same genetic code in fireflies and tobacco plants, Vestigial pelvis in right whales

Biogeography: Similarity of endemic island species to nearby mainland species, The high concentration of marsupial species in Australia

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3 years ago

In an inelastic collision a 2.5 kg ball moving at 7.5 m/s is caught by a 70kg man while the man is standing on ice. What is the

MrRa [10]

The velocity of the ball and the man is 0.259 m/s

Explanation:

We can solve this problem by using the law of conservation of momentum. In fact, in an isolated system, the total momentum before and after the collision must be conserved. Therefore, for the ball-man system, we can write:

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