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GRAVITATIONAL FIELDS E-DAY ALTERNATIVE TASK

Last updated 10 months ago
25 questions
Note from the author:
Collect graph paper (or use your own) before you start this task. This graph MUST be handed in at the end of the E-day session in order for it to be marked.
To type answers that have superscripts, please follow this format (using ^ to indicate superscript):
For scientific notation: e.g. One hundred thousand (100 000) would be typed like this: 1,0 x 10^5
For units such as metres per second squared, type is like this m.s^-2
Collect graph paper (or use your own) before you start this task. This graph MUST be handed in at the end of the E-day session in order for it to be marked.
To type answers that have superscripts, please follow this format (using ^ to indicate superscript):
For scientific notation: e.g. One hundred thousand (100 000) would be typed like this: 1,0 x 10^5
For units such as metres per second squared, type is like this m.s^-2

SECTION A

Watch the slide presentation embedded below on mass and weight and then answer the questions that follow. To go to the next slide click on "next" in the bottom right hand corner.

Here is the direct link to the presentation if yours is not working in the Formative below.
https://wisconline.blob.core.windows.net/learning-object/TP1402/index.html
Required
1

What is the property of an object that determines the amount of matter it contains?

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1

What is the force experienced by an object due to the gravitational pull of the Earth?

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1

Which of the following is a vector quantity?

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1

What is the SI unit of mass?

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1

Which of the following statements is correct?

Watch the video on Newton's law of universal gravitation. Here is the link if this video is not working on Formative: video

Newton's law of universal gravitation is described below too:
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1

Which of the following statements is true regarding the gravitational force?

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1

What is the gravitational force between two objects directly proportional to?

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1

What happens to an object's weight when it is taken to a location with higher gravity, such as a planet with greater mass?

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1

Why do astronauts experience weightlessness in space?

Note the mathematical relationship between gravitational force and the product of the masses:

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1

What happens to the gravitational force between two objects if the mass of one object is doubled?

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1

What happens to the gravitational force between two objects if the mass of BOTH objects are doubled?

Note the mathematical relationship between gravitational force and distance:

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1

What happens to the gravitational force between two objects if the distance between them is doubled?

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1

What happens to the gravitational force between two objects if the distance between them is halved?

Read the following information from your textbook pg 213:



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1

What is the relation between an object's mass and weight?

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1

Which property of an object remains constant on the Moon's surface compared to its value on Earth?

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1

Which of the following objects experiences the strongest gravitational force on the surface of the Earth?

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1

Consider the masses of the following planets in our solar system:
Order them from smallest mass to greatest mass

  1. Earth
  2. Mercury
  3. Venus
  4. Mars
  5. Neptune
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1

Order the planets from smallest to largest (diameter)

  1. Venus
  2. Mars
  3. Neptune
  4. Earth
  5. Mercury
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6
Calculate the value of the acceleration due to gravity "g" on Mars, by following this reasoning:
Mars has a mass of _______ (answer to 2 decimal places and include units) and a radius of _______ (answer to 2 decimal places and include CORRECT units).
Using the equation:
Remember that big "G" = 6,7 x 10-11

g can be calculated to be _______ (answer to 2 decimal places and include units).
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8
We are now going to calculate the gravitational force (F) between Earth and Venus when they are 61 000 000 km apart, using Newton's law of universal gravitation:

m1 = mass of Earth = _______ (answer to 2 decimal places and include units), and
m2 = mass of Venus = _______ (answer to 2 decimal places and include units)

To calculate "r":
HINT: Look above at the information provided to remind yourself what 'r' is.
Use the information in the image above (sizes of the planets) and the fact that they are 61 000 000 (or 6,1 x 10^7 km) apart.
∴ r = _______ (answer in scientific notation as shown above and include units).

Gravitational force is therefore:
∴ F = _______ (answer in scientific notation as shown above and include units).

SECTION B

Graphing activity.
Complete the graph on paper and hand in to Mrs Kühn at the end of the session.
The following data was collected on a particular planet during an investigation to calculate the acceleration due to gravity (g) on that planet. The weight of each mass was measured and the results were recorded in the table below:

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2
Identify the variables in this investigation.
The dependent variable is _______________ and the independent variable is ______________ .
Other Answer Choices:
radus of planet
mass (kg)
weight (N)
acceleration due to gravity
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8

Plot a graph of weight vs mass on your piece of graph paper. Draw a line of best fit.

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5

On the back of your graph, calculate the gradient of your line. Be sure to show the values you used ON YOUR ACTUAL GRAPH (circle them) and also include the appropriate unit for this gradient (as per the graph)

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1

What is the acceleration due to gravity (g) on this planet? Use the appropriate unit.

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2

Hence, use the following data to identify the planet used in this investigation: