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den301095 [7]
3 years ago
11

What is the mass of a dog that weighs 382 N?(unit=kg)

Physics
1 answer:
Luba_88 [7]3 years ago
6 0

Answer:

The answer to your question is: mass = 38.93 kg

Explanation:

Data

mass = ?

Weight = 382 N

gravity = 9.81 m/s2

Formula

Weight = mass x gravity

mass = weight / gravity

mass = 382 / 9.81         substitution

mass = 38.93 kg           result

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IRINA_888 [86]

Initial height: 66.5 m

Explanation:

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If we neglect air resistance, the total mechanical energy of the car is conserved during the fall, therefore we can write:

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where :

K_i = 0 is the kinetic energy of the car at the top (it starts from rest)

U_i = mgh is the gravitational potential energy of the car at the top, with:

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g = the acceleration of gravity

h = the heigth of the car

K_f = \frac{1}{2}mv^2 is the kinetic energy of the car just before hitting the ground, with

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Re-arranging the equation,  we find

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

and we have:

g=9.8 m/s^2\\v = 130 km/h = 36.1 m/s

Solving for h, we find the initial height of the car:

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3 years ago
Two electromagnets contain the same types of magnets
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Answer: The first electromagnet has a more powerful current than

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