Question

**Quesiton A**. Two objects are attracting each
other with a certain gravitational force. If the original force
between the two objects is 0.82 N , and the distance is tripled,
what is the new gravitational force between the objects?

**Question B.** A bowling ball weighing 71.2 N is
attached to the ceiling by a 4.00 m rope. The ball is pulled to one
side and released; it then swings back and forth like a pendulum.
As the rope swings through its lowest point, the speed of the
bowling ball is measured at 4.40 m/s .

-At that instant, find the magnitude of the acceleration of the bowling ball.?

-At that instant, find the tension in the rope. ?

Answer #1

At this instant the object is moving in a circular path

so a = v^2/r

= 4.40^2 / 4.00 = 4.84m/s^2

The direction when it is in circular motion at constant speed is
always toward the center of the circle.

The rope must provide sufficient force to overcome gravity plus
enough more to accelerate it in a circle.

If gravity needs 71.2 N then the mass of the object must be
71.2/9.8 = 7.27Kg

m*a=F(up) 7.27*4.84= 35.18 N

N(up) + W (down) = Tension 35.18+ 71.2 = 106.38Tension

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point in its swing, what is the acceleration of the bowling ball,
in...

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ch 6
1:
It is generally a good idea to gain an understanding of the
"size" of units. Consider the objects and calculate the kinetic
energy of each one.
A ladybug weighing 37.3 mg
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.
×10
J
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.
J
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5:
The graph shows the ?-directed force
??...

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