What is the relationship between force and distance in an inverse-square law?

Is the force of gravity stronger on a piece of iron than on a piece of wood of the same mass? Defend your answer.

What does Kepler’s first law of planetary motion state? A. The orbit of a planet around the sun is an ellipse with the sun at one focus. B. The orbit of a planet is dependent on heat. C. Centripetal force and elliptical force are different. D. The orbital period of a planet is infinite.

The weight of an astronaut plus his space suit on the Moon is only 250 N. (a) How much does the suited astronaut weigh on Earth? (b) What is the mass on the Moon? On Earth?

What would be the path of the Moon if somehow all gravitational forces on it vanished to zero?

Gravitational force acts on all bodies in proportion to their masses. Why, then, doesn't a heavy body fall faster than a light body?

Comment on whether or not the following label on a consumer product should be cause for concern: CAUTION: The mass of this product pulls on every other mass in the universe, with an attracting force that is proportional to the product of the masses and inversely proportional to the square of the distance between their centers.

What is the magnitude of the gravitational force between two $1-\mathrm{kg}$ bodies that are $1 \mathrm{~m}$ apart?

Rank the microtidal forces on your own body, from greatest to least, produced by the a. Moon. b. Earth. c. Sun.

Rank the average gravitational forces from greatest to least between the a. Sun and Mars. b. Sun and the Moon. c. Sun and Earth.

Pretend you fall into a hole bored completely through the Earth. Discounting friction and rotational effects, rank from greatest to least positions A, B, C, and D for your a. speed. b. acceleration toward Earth's center.

Consider the light of multiple candle flames, each of the same brightness. Rank the light that enters your eye from brightest to dimmest for the following situations: a. Three candles seen from a distance of $3 \mathrm{~m}$ b. Two candles seen from a distance of $2 \mathrm{~m}$ c. One candle seen from a distance of $1 \mathrm{~m}$

The planet (M) and its moon (m) gravitationally attract each other. Rank the forces of attraction between each pair, from greatest to least. A- M-m (distance between M and m is d) B- 2M-m (distance between 2M and m is d) C- M- 2m (distance between M and 2m is d) D- M-2m (distance between M and 2m is 2d)

Newton's universal law of gravity tells us that

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

Newton's second law tells us that $a=\frac{F_{n q}}{m}$.