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2 years ago

2) Calculate the gravitational potential energy that a parachutist has just as he

Physics

1 answer:

masya89 [10]2 years ago

5 0

Answer:

<em>The gravitational potential energy of the parachutist is 3,528,000 J</em>

Explanation:

<u>Gravitational Potential Energy </u>

It's the energy stored in an object because of its height in a gravitational field.

It can be calculated with the equation:

U=m.g.h

Where:

m = mass of the object

h = height with respect to a fixed reference

g = acceleration of gravity, usually taken as $9.8 m/s^2$ .

The parachutist has a mass of m=120 kg and he jumps at a height of h= 3,000 m. Computing the gravitational potential energy:

U = 120 * 3,000 * 9.8

U = 3,528,000 J

The gravitational potential energy of the parachutist is 3,528,000 J

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The structural diversity of carbon-based molecules is determined by which properties?

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Explanation:

The structural diversity of carbon-based molecules is determined by following properties:

1. the ability of those bonds to rotate freely,

2.the ability of carbon to form four covalent bonds,

3.the orientation of those bonds in the form of a tetrahedron.

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2 years ago

A stationary 15 kg object is located in a table near the surface of the earth. The coefficient of static friction between the su

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maximum static friction acting on the object will be

$F_s = \mu_s mg$

plug in all values

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So here it is given that applied force is 20 N

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2 years ago

The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.2 × 10-15 m. The single electron in a hydrogen

Nutka1998 [239]

Answer: 0.86 × 10^14

Explanation:

Given the following :

Radius of proton = 1.2 × 10-15 m

Radius of hydrogen atom = 5.3 × 10-11 m

Density of proton could be calculated thus:

Mass of proton = 1.67 × 10^-27 kg

Using the formula :

(4/3) × pi × r^3

(4/3) × 3.142 × (1.2 × 10^-15)^3 = 7.24 × 10^-45

Density = mass / volume

Density = (1.67 × 10^-27) / ( 7.24 × 10^-45)

= 0.2306 × 10^18

Density of hydrogen atom:

Mass of hydrogen atom= 1.67 × 10^-27 kg

Using the formula :

(4/3) × pi × r^3

(4/3) × 3.142 × (5.3 × 10^-11)^3 = 6.24 × 10^-31

Density = mass / volume

Density = (1.67 × 10^-27) / ( 6.24 × 10^-31)

= 0.2676 × 10^4

Ratio is thus:

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3 years ago

Why must you bend forward when carrying a

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Answer:

hi I thinks its number 3

Explanation:

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2 years ago

A 3.20 kg block starts at rest and slides a distance d down a frictionless β = 30.0 ◦ incline, where it runs into a spring with

Virty [35]

Answer:

Explanation:

a ) work done by gravitational force

= mg sinθ ( d + .21)

Potential energy stored in compressed spring

= 1/2 k x²

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According to conservation of energy

mg sinθ ( d + .21) = 9.5

3.2 x 9.8 x sin 30( d + .21 ) = 9.5

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b )

As long as mg sin30 is greater than kx ( restoring force ) , there will be acceleration in the block.

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When there is compression of 3.63 cm in the spring , block will have maximum velocity. there after its speed will start decreasing.

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2 years ago