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3 years ago

Calculate the gravitational force between a 10 kg ball and 20 kg ball

Physics

1 answer:

elena-s [515]3 years ago

7 0

Answer:

$5.34\cdot 10^{-10} N$

Explanation:

The gravitational force is an attractive force exerted between any objects with mass.

The magnitude of the gravitational force between two objects is given by:

$F=G\frac{m_1 m_2}{r^2}$

where

G is the gravitational constant

m1, m2 are the masses of the two objects

r is the separation between the two objects

In this problem, we have:

$m_1 = 10 kg$ is the mass of the 1st ball

$m_2 = 20 kg$ is the mass of the 2nd ball

r = 5 m is the separation

So, the gravitational force between them is

$F=(6.67\cdot 10^{-11})\frac{(10)(20)}{5^2}=5.34\cdot 10^{-10} N$

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Which expression allows you to determine the mechanical advantage of an inclined plane?

Leya [2.2K]

Answer:

Explanation:

The mechanical advantage of an inclined plane can be determined using different variables. In this case, the geometry of the setup is relevant. The advantage is proportional to the length of the plane, and inversely proportional to the height: it is the ratio (length) / (height) of the plane. For example, given a desired, fixed height, a long inclined plane gives you a bigger mechanical advantage than a short inclined plane. In this example, pushing an object up the long plane will require a smaller force, than it would on the short plane.

Strictly speaking, (D) would also "allow you to determine the mechanical advantage" because you could simply invert the ratio listed under (D). However, (C) is the best, direct, answer.

4 0

3 years ago

A 700 kg car is moving at 10 m/s west rear ends a 500 kg car at rest. They both stuck together after the collision and continue

nataly862011 [7]

Answer:

$v = 5.833\,\frac{m}{s}$

Explanation:

The collision is inelastic and can be described by the Principle of Momentum Conservation:

$(700\,kg)\cdot (10\,\frac{m}{s} ) + (500\,kg)\cdot (0\,\frac{m}{s} ) = (1200\,kg)\cdot v$

The speed after the collision is:

$v = 5.833\,\frac{m}{s}$

6 0

3 years ago

Read 2 more answers

If gravity did not affect the path of a horizontally thrown ball the ball would ____

Setler79 [48]

If gravity did not affect the path of a horizontally thrown ball the ball would eventually slow due to air resistance. If the ball were somehow thrown in a vacuum devoid of gravity and air, it would technically continue in a straight line forever.

5 0

4 years ago

A lightening bolt may carry a current of 11800 A for a short period of time. The permeability of free space is 1.25664 × 10−6 T

Deffense [45]

Answer:

The resulting magnetic field is 5.021 x 10⁻⁵ T

Explanation:

Given;

current in the lightening bolt, I = 11800 A

distance from the bolt, r = 47 m

permeability of free space, μ₀ = 1.25664 × 10⁻⁶ T· m/A

Assume lightening bolt as long straight conductor, then the resulting magnetic field will be calculated as follows;

$B = \frac{\mu_oI}{2 \pi r}$

where;

B is the resulting magnetic field

I is the current in the bolt

r is the distance from the bolt

Substitute the given values and calculate B

$B = \frac{\mu_oI}{2 \pi r} \\\\B = \frac{1.25664 *10^{-6}*11800}{2 \pi (47)} \\\\B = 5.021 *10^{-5} \ T$

Thus, the resulting magnetic field is 5.021 x 10⁻⁵ T

4 0

3 years ago

SO4 +NaOH ➡ Na2SO4+H20

AlexFokin [52]

Answer:

2NaOH+H2SO4 Na2SO4+H2O the equation is balanced/unbalanced because the number of hydrogen atoms and oxygen/sodium is equal/not equal in the reactants and in the products.

Explanation:

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3 years ago