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Andreyy89
3 years ago
5

What is the mass of an object if a net force of 8.0 N causes it to accelerate at 1.1 m/s2?

Physics
1 answer:
nataly862011 [7]3 years ago
4 0
Using , F= ma .
where F is netforce , m is mass and a is acceleration produced .
=> m=F/a.
m= 8/1.1 = 7.27 Kg.
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F_g = F_c

\frac{GmM}{r^2} = \frac{mv^2}{r}

Where,

m = Mass of spacecraft

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r = Radius (Orbit)

G = Gravitational Universal Music

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Re-arrange to find the velocity

\frac{GM}{r^2} = \frac{v^2}{r}

\frac{GM}{r} = v^2

v = \sqrt{\frac{GM}{r}}

PART A ) The radius of the spacecraft's orbit is 2 times the radius of the earth, that is, considering the center of the earth, the spacecraft is 3 times at that distance. Replacing then,

v = \sqrt{\frac{(6.67*10^{-11})(5.97*10^{24})}{3*(6.371*10^6)}}

v = 4564.42m/s

From the speed it is possible to use find the formula, so

T = \frac{2\pi r}{v}

T = \frac{2\pi (6.371*10^6)}{4564.42}

T = 8770.05s\approx 146min\approx 2.4hour

Therefore the orbital period of the spacecraft is 2 hours and 24 minutes.

PART B) To find the kinetic energy we simply apply the definition of kinetic energy on the ship, which is

KE = \frac{1}{2} mv^2

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KE = 1.0416*10^9J

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kinetic energy is converted into elastic potential energy stored in the brakes.
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Explanation:

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Answer:

<h2> 4kg</h2>

Explanation:

Step one:

given

length of rod=2m

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let the unknown mass be x

center of mass<em> c.m</em>= 1.6m

hence 1kg is 1.6m from the <em>c.m</em>

and x is 0.4m from the <em>c.m</em>

Taking moment about the <em>c.m</em>

<em>clockwise moment equals anticlockwise moments</em>

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3 years ago
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