Question

QUESTION 3

Two wagons of equal mass are filled with an equal mass of bricks. Person A pushes one wagon with twice the force that Person B pushes the second wagon. How is the acceleration affected?

Person A's wagon will accelerate at twice the rate of Person B's wagon.

Person B's wagon will accelerate at twice the rate of Person A's wagon.

Person A's wagon will accelerate at half the rate of Person B's wagon.

Both wagons will accelerate at the same rate since their masses are the same.
2 points

QUESTION 4

Two shopping carts are pushed with the same amount of force. The shopping carts have the same mass. Shopping cart A is pushed with three times the force as shopping cart B. How does the force applied to the shopping carts affect their acceleration?

Shopping cart B accelerates three times as fast as shopping cart A.

Shopping cart B accelerates twice as fast as shopping cart A.

Both shopping carts will accelerate at the same rate since their masses are the same.

Shopping cart A accelerates three times as fast as shopping cart B.
2 points

QUESTION 5

If the moon were twice as far from Earth as it is now, which of the following would be true?

The gravitational pull between the moon and Earth would decrease because the distance between the moon and Earth would have increased.

The gravitational pull between the moon and Earth would be the same because their masses have not changed.

Earth's gravitational pull on the moon would be the same as it is now because distance does not affect Earth's gravity.

The gravitational pull would be zero.
2 points

QUESTION 6

Imagine a solar system in which all of the planets orbit a star, and this star is more massive than any of the other planets. Additionally, all of the planets have the same mass, but Planet A is closer to the star than Planet B. Which of the following is also true?

The gravitational pull between the star and Planet A is greater than the pull between the star and Planet B because Planet A is closer to the star than Planet B.

The gravitational pull between the star and Planet A is the same as the pull between the star and Planet B because Planet A and Planet B have the same mass.

The gravitational pull between the star and Planet B is greater than the pull between the star and Planet A because Planet A is closer to the star than Planet B.

The gravitational pull between the star and Planet A is the same as the pull between the star and Planet B becaus

Answer 1

This should be in the Physics section.

3) This question requires an understanding of the formula F=ma. Doubling the force with constant mass will double the acceleration.

4) Same logic as question 3. If you triple the force, and have the mass as constant, what do you think should happen to the acceleration?

5) This question requires an understanding of the Newton's law of gravitation:
\(F_g=G\frac{m_1m_2}{r^2}\)
You don't need to worry about the constant G, and m1 and m2 because we just need to worry about r, the distance. Because r is in the denominator, we can imply that \(F_g∝\frac{1}{r}\). Since the question doesn't ask us for the change in the magnitude r, we don't need to find it. Otherwise, plug in '2r' as r and you should simplify.

6) Same logic as question 5. Don't get tricked by the initial description about the masses, because the masses of all the planets and the stars are constant, or \(m_1\) and \(m_2\) are constant. Pay close attention to the distance. Distance and force of gravity are inversely proportional, as I indicated in the previous question.