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Aleks [24]
2 years ago
9

An object weighing 4 newtons swings on the end of a string as a simple pendulum. At the bottom of the swing, the tension in the

string is 6 newtons. What is the magnitude of the centripetal acceleration of the object at the bottom of the swing?
(A) 0
(B) 0.5 g
(C) g
(D) 1.5 g
(E) 2.5 g
Physics
2 answers:
Anit [1.1K]2 years ago
8 0

Answer:

(B) 0.5 g

Explanation:

Newton's second law says ∑  F i = m a .

the rate of change in momentum of a body is proportional to the force applied on the body.

f∝ma

f=kma

were k is constant and equal to 1

The centripetal acceleration is an acceleration.

the tension on the swing and object weight goes to the left hand side while the centripetal acceleration goes to the right handside

At the bottom of the swing, ΣF = FT – mg = mac;

notice that the tension in the swing is 1.5 times the weight of the object

we can write

1.5mg – mg = mac,

0.5mg = mac

0.5 g=ac

erica [24]2 years ago
3 0

Answer:

Option B: 0.5g

Explanation:

It is established by Newtons second Law that Force = mass x acceleration.

Therefore, the notation below explains the relationship between Force, Tension and Weight at the bottom of the swing of a simple pendulum as cited in the question.

F = T - mg = mass x centripetal acceleration

where T represents Tension, and mg represents weight

Therefore,

Force = 6 newtons - 4 newtons = mass x acceleration

Our result becomes, 2 newtons = 4 newtons x acceleration ( Recall our mass is equal to 4 newtons)

Let our centripetal acceleration be represented by a,

2N = 4N x a

This gives us a = 2N/4N (by making "a" the subject of the formula)

Final answer is 0.5g or 1/2g.

Please note:

At the top, the relationship becomes : F = Tension(force) + Weight(mg) = (mass x velocity^2)/R.

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It is estimated that uranium is relatively common in the earth's crust, occurring in amounts of 4 g / metric ton. A metric ton i
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Answer:

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Sally and Sam are in a spaceship that comes to within 14,000 km of the asteroid Ceres. Determine the force Sally experiences, in
tatiyna

Sam and Sally are traveling aboard a spacecraft that approaches the asteroid Ceres within 14,000 kilometers. Sally will experience 1.989 × 10⁻¹¹  N of force.

<h3>What is the gravitational force?</h3>

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.

The gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.

Given data

Mass of asteroid ,m₁ = 8.7 1020 kg

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Gravitational constant,G = 6.6 × 10⁻¹¹ kg⁻² m²

Distance of seperation,R =  14,000 km

\rm F = G\frac{m_1m_2}{R^ 2} \\\\ F = 6.6 \times 10^{-11 }\times \frac{8.71020  \times 67 }{(14,000)^2}  \\\\F =  1.989 \times 10^{-11 } \ N

Hence, the force Sally experiences will be 1.989 × 10⁻¹¹  N.

To learn more about the gravitational force, refer to the link;

brainly.com/question/24783651

#SPJ1

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