Question

Question 13 (2 points)
A mass of 5.00 kg is in a gravitational field of�7.00�N/kg�. What force acts on the mass?
Question 13 options:

35.0 N

0.71 N

1.4 N

9.8 N
Question 14 (2 points)
If you plotted vector arrows around a mass to represent gravitational field vectors, describe how the length of the arrows would change as the locations at which they are drawn become closer to the mass that produces the field.
Question 14 options:

The arrows would become shorter.

The arrows would become longer.

The arrows would remain the same length.

The arrows would become shorter and reverse direction at some distance.
Question 15 (2 points)
What is Kepler's first law of planetary motion?
Question 15 options:

Planets have circular orbits.

Planets have elliptical orbits.

The eccentricity of a planet's orbit is proportional to its distance from the sun.

The period of a planet's orbit is proportional to its distance from the sun.
Question 16 (2 points)
Which of these is correct about the moon's motion around the earth?
Question 16 options:

Centrifugal force acting on the moon balances the force of the earth's gravity.

The moon is in free fall.

There is no gravity acting on the moon because it is in orbit.

The moon exerts no gravitational force on the earth.
Question 17 (2 points)
Which of the following objects do not have gravitational fields?
Question 17 options:

apple

boulder

cat

all objects have gravitational fields
Question 18 (2 points)
Which of the following will generate the largest gravitational field?
Question 18 options:

a paperclip

a dog

a computer

the Earth
Question 19 (2 points)
What happens to the gravitational force between two objects if the distance between them decreases?
Question 19 options:

The gravitational force increases.

The gravitational force decreases.

The gravitational force stays the same.

The gravitational force is not related to the distance.
Question 20 (2 points)
What happens to the gravitational force between two objects if the distance between them increases?
Question 20 options:

The gravitational force increases.

The gravitational force decreases.

The gravitational force stays the same.

The gravitational force is not related to the distance.
Question 21 (2 points)
What happens to the gravitational force between two objects if the mass of both increases?
Question 21 options:

The gravitational force increases.

The gravitational force decreases.

The gravitational force stays the same.

The gravitational force is not related to the distance.
Question 22 (2 points)
What happens to the gravitational force between two objects if the mass of both decreases?
Question 22 options:

The gravitational force increases.

The gravitational force decreases.

The gravitational force stays the same.

The gravitational force is not related to the distance.
Question 23 (2 points)
Which of these is generally considered to have been discovered by Einstein?
Question 23 options:

Mass bends space-time.

Space is empty.

An electric charge produces an electric field around it.

Gravity causes acceleration.
Question 24 (2 points)
Which of the following scientists is not involved with gravitation?
Question 24 options:

Einstein

Kepler

Newton

Curie
Question 25 (2 points)
What type of force is gravitational force?
Question 25 options:

field force

applied force

contact force

Answer 1

The required answers are stated below:

13. The force acting on the mass can be calculated by:

Force = mass x gravitational field

          = 5.0 x 7.0

          = 35.0 N

The force acting is 35.0 N. Thus, option A.

14. When the location of the arrows become closer to the mass, the arrows would become shorter. Option A.

15. Kepler's first law of planetary motion is: Planets have elliptical orbits. Option B.

16. The correct option is A. Centrifugal force acting on the moon balances the force of the earth's gravity.

17. Considering the given options, all the objects have gravitational fields. Thus option D.

18. The Earth will generate the largest gravitational field. Option D.

19. When the distance between two objects decreases, the gravitational force between them increases. Option A. The gravitational force increases.

20. When the distance between two objects increases, the gravitational force between them decreases. Option B. The gravitational force decreases.

21. When the mass of two objects increases, the gravitational force between them increases. Option A. The gravitational force increases.

22. When the mass of two objects decreases, the gravitational force between them decreases. Option B. The gravitational force decreases.

23. Einstein discovered that: Gravity causes acceleration. Option D

24. The scientist from the given options that is not involved with gravitation is Curie. Option D.

25. Force field is a type of force that do not require contact before it can be felt. Gravitational force is a field force. Option A.

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