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LiRa [457]
3 years ago
12

Three identical 50-kg balls are held at the corners of an equilateral triangle, 30 cm on each side. if one of the balls is relea

sed, what is the magnitude of its initial acceleration if the only forces acting on it are the gravitational forces due to the other two masses? (g = 6.67 × 10-11 n • m2/kg2)
Physics
2 answers:
Ivahew [28]3 years ago
6 0

Answer:

a= 6.42×10⁻⁸m/s²

Explanation:

Given Data

mass=m=50 kg

angle=α=30°

Gravitational Constant=G=6.67 × 10-11 Nm²/kg²)

To find

acceleration=a=?

Solution

From Gravitational Law " the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface "

F₁ = G×m²/D²

F = 2*F₁*cos30° = 2*G*50²*cos30°/0.3² = 3.21×10⁻⁶N  

a = F/m = 3.21×10⁻⁶/50

a= 6.42×10⁻⁸m/s²

natima [27]3 years ago
3 0
F1 = G*m²/D² 
<span>F = 2*F1*cos30° = 2*G*50²*cos30°/0.3² = 3.21E-6 </span>

<span>a = F/m = 3.21E-6/50 = 6.42E-8

Hope this helped!
STSN</span>
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A flatbed truck is supported by its four drive wheels, and is moving with an acceleration of 7.4 m/s2. For what value of the coe
inn [45]

Answer:

The value is  \mu  = 0.76

Explanation:

From the question we are told that

    The  acceleration is a =  7.4 \ m /s^2

Generally the force by which the truck bed (truck) is moving with is mathematically represented as

          F  =  ma

Now for the truck cabinet to slip from the truck bed then the frictional force between the truck cabinet  is equal the force by which the the truck bed is moving with that is  

        F_f  =  F

Here  F_f is the frictional force which is mathematically represented as

         F_f  =  \mu *  m *  g

substituting into above equation

         \mu *  m * g  =  ma

=>        \mu  =  \frac{a}{g}

substituting values

           \mu  =  \frac{ 7.4 }{ 9.8}

           \mu  = 0.76

         

6 0
3 years ago
If you were to drop a rock from a tall building, assuming that it had not yet hit the ground, and neglecting air resistance. Wha
Olegator [25]

Answer:

<h2>500m</h2>

Explanation:

Using the equation of motion S = ut + 1/2 gt²

S = the vertical displacement (in m)

u = initial velocity of the object (in m/s)

g = acceleration due to gravity (in m/s²)

t = time taken (in secs)

Given u = 0m/s, g = 10m/s² and t = 10s, substituting this value into the equation to get the vertical displacement w have;

S = 0+1/2 (10)(10)²

S = 1000/2

S = 500m

The vertical displacement after 10seconds is 500m

5 0
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Suppose you start an antique car by exerting a force of 258 N on its crank for 0.270 s. What angular momentum is given to the en
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Answer:

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Explanation:

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Then the angular momentum is given to the handle within 0.27 seconds is

M_{\alpha} = T*t = 258*0.27 = 69.66 rad/s

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Which of the following exhibits parabolic motion?
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