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3 years ago

State one of Kepler's laws of gravitation

2 answers:

7 0

Kepler isn't known for any work on gravitation. The 'laws' named for him all describe the motions of planets. His descriptions were entirely based on observations, made by somebody else and written down over a period of many years. Kepler just described a structure and motions that would produce those observations ... He never said WHY the planets do what they do.

It was NEWTON, a long time after Kepler, who worked on gravity, and showed that with HIS formula for gravity, planets would HAVE TO do what Kepler said they probably do.

jekas [21]3 years ago

3 0

All planets move around the sun

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Answer:

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3 years ago

Which objects will likely have the smallest gravitational force between them?

DENIUS [597]

Answer:

A. Two tennis balls that are near each other

Explanation:

The formula for gravitational force (F) between two objects is

$F = \dfrac{Gm_{1}m_{2}}{d^{2} }$

where m₁ and m₂ are the masses of the two objects, d is the distance between their centres, and G is the gravitational constant.

Thus, two objects that are far from each other will have a smaller gravitational force. We can eliminate Options C and D.

If the objects are at the same distance, those with the smaller mass will have a smaller force.

The mass of a tennis ball is 57 g.

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3 years ago

If the torque required to loosen a nut that

liraira [26]

Explanation:

τ = Fr

34 Nm = F (0.30 m)

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