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3 years ago

Newton discovered that gravity behaves differently in space than it does on Earth. true or false?

1 answer:

5 0

Yes. It is true. Gravity behaves differently than on earth. In-fact, as we go above the earth surface the gravity decreases. Gravity as we go above the earth surface can be calculated using following formula:

g' = g(1-2h/R)

Hence, it is true that the gravity behaves differently than on earth.

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What force is necessary to pull a 10 kg sled across a horizontal surface at a constant velocity if the coefficient of kinetic fr

Igoryamba

Answer:

Any force greater than 24.5 N

Explanation:

To find the frictional force is the 1st step. this can be found by multiplying the coefficient of friction and the normal force. normal force can be found by multiplying gravity (we will say 9.8 m/s/s) and the mass which is 10. You then multiply the result by the coefficient of friction which is 0.25 and it leads us to an answer to 24.5 N. This means that if you pull with exactly 24.5 N, the sled wouldnt move. So you need a force greater than 24.5 N and we have our answer.

I hope I helped correct me if im wrong

3 0

3 years ago

A passenger plane is flying above the ground.Describe the two components of its mechanical enserfy

Goryan [66]

The force and the air resistance depends on the mechanical enserfy.

3 0

4 years ago

What is the kinetic energy of a 0.150 kg<br> object moving at a velocity of 100m/s?

ozzi

Answer:

750J

Explanation:

Given parameters:

Mass of the object = 0.15kg

Velocity of the object = 100m/s

Unknown:

Kinetic energy of the body = ?

Solution:

The kinetic energy is the energy due to the motion of a body. It is mathematically expressed as;

K.E = $\frac{1}{2}$ m v²

m is the mass of the body

v is the velocity

Now insert the parameters and solve;

K.E = $\frac{1}{2}$ x 0.15 x 100² = 750J

7 0

3 years ago

PLEASE HELP!!!!!!!!

Katena32 [7]

Answer:

6 also

Explanation:

Since Kinetic Energy and mass are directly proportional, as one increases, the other will increase with the same magnitude

8 0

3 years ago

An air-filled capacitor consists of two parallel plates, each with an area of 8 cm^2 , separated by a distance 2.9 mm. A 22 V po

Alenkasestr [34]

Answer:

The magnitude of the surface charge density on each plate is 6.714 x 10⁻⁸ C/m²

Explanation:

Given;

area of the parallel plates, A = 8 cm² = 8 x 10⁻⁴ m²

distance between the plates, d = 2.9 mm = 0.0029 m

potential difference applied to the plates, V = 22 V

The electric field between the plates is given by;

$E = \frac{V}{d} \\\\E = \frac{22}{2.9*10^{-3}}\\\\E = 7586.207 \ V/m$

The surface charge density is given by;

σ = ε₀E

σ = (8.85 x 10⁻¹²)(7586.207)

σ = 6.714 x 10⁻⁸ C/m²

Therefore, the magnitude of the surface charge density on each plate is 6.714 x 10⁻⁸ C/m²

7 0

4 years ago