Someone has just twitted about this brilliant animation. I hope it makes you realise the consequences of different gravitational field strengths.
Mrs Physics and Ms Horn are working on the last unit for the N5 course- the new Space Topic.
There have been several changes from the previous outcomes. This ought to be the most up to date work.
Sorry I just couldn’t get this to fit on 2 pages. I am sure someone will send it back to me looking beautiful!
Just heard about this on twitter!
You can read about some of the risks of human spaceflight in the infographic below.
Here are a few links and documents. Hope you can get access to them.
Lockerbie Academy’s Faulkes Telescope Pictures Some of Lockerbie Academy’s Faulkes Telescope pictures taken by students in the school from 2007.
Here are the posters produced by N5 (2016-2017) They answer the questions posed in the research task document below which was created from the Full Content Check 2016. Check them out. There are still a few to come and some need to be updated. If yours isn’t here then let me know and we’ll update.
research tasks as a pdf file
research tasks as a doc file
(they’ll take some time to upload so be patient!)
In orbital mechanics and aerospace engineering, a gravitational slingshot, gravity assist manoeuvre, or swing-by is the use of the relative movement (e.g. orbit around the Sun) and gravity of a planet or other astronomical object to alter the path and speed of a spacecraft. This saves fuel, time, and expense. Gravity assistance can be used to increase or decrease its speed or redirect the path of a spacecraft. The “assist” is provided by the motion of the gravitating body as it pulls on the spacecraft. It was used by interplanetary probes from Mariner 10 onwards, including the two Voyager probes’ notable flybys of Jupiter and Saturn.
A gravity assist around a planet changes a spacecraft’s velocity (relative to the Sun) by entering and leaving the gravitational field of a planet. The spacecraft’s speed increases as it approaches the planet and decreases while escaping its gravitational pull. Because the planet orbits the sun, the spacecraft is affected by this motion during the manoeuver. To increase speed, the spacecraft flies with the movement of the planet (taking a small amount of the planet’s orbital energy); to decrease speed, the spacecraft flies against the movement of the planet. The sum of the kinetic energies of both bodies remains constant.
Open Ended Space Question
- From your knowledge of energy, what might a space exploration scientist consider when sending a machine to land safely on an extra terrestrial body? The machine must be capable of sending back some intelligible data
- Two people are discussing satellite motion one person says:
“Satellites stay in motion because there is no gravity”
Using your knowledge of Physics comment on that response.
- An astronaut on the international space station was quoted as saying:
“I sometimes feel like a human cannon ball.”
Using your knowledge of physics explain why he is like a cannon ball in space.
- Recently Voyager 1, one of the first space probes launched by NASA in 1977, has now left our Solar System.
EITHER: Using your knowledge of physics, explain how this space probe was able to reach the outer planets.
OR: Using your knowledge of physics, explain how NASA might know that the probe has now left our Solar System.
OR: Using your knowledge of physics, comment on what happens next to this space probe.
5. A daytime newsreader commented that, “Looking at the stars is like looking back in time.” Use your knowledge of physics to comment on the journalist’s statement.
6. There are many parts of space that are detected by different types of telescope. Use your knowledge of physics to describe one telescope that is used in astronomy.
7. A ball rolls off from a table as shown.
Use your knowledge of physics to comment on what the ball’s horizontal distance from the edge of the table would and would not depend on.
8. A velocity-time graph of skydiver 1 is shown below
A velocity-time graph of skydiver 2is shown below
Use your knowledge of physics to explain how the second skydiver’s velocity-time graph during descent compares with that of the first skydiver.
These are some very basic definitions for the Space Topic
|Universe:||Sum total of everything that exists.|
|Galaxy:||A basic building block of the universe that includes stars, star clusters, clouds of gas, dust and interstellar molecules.|
|Solar System:||Is one or more suns surrounded by orbiting planets. Our solar system is composed of the sun, 9 known planets and at least 44 moons, thousands of “minor planets” (asteroids) meteors and perhaps billions of comets.|
|Sun:||Dominant member of a solar system accounts 99% of the mass of the solar system. The sun is a giant star it produces heat and light. A big ball of plasma|
|Star:||Principle components of galaxies. Living stars emit radiation across the electromagnetic spectrum. Peak depends on the heat of the surface.|
|Planet:||A relatively large body rotating in an elliptical orbit around a sun.|
|Moon:||A natural satellite of a planet i.e. rotates around a planet. Moons do not produce their own light.|
|Mass:||Mass is a measure of the amount of matter in an object. It is measured in kilograms. Wherever you go your mass stays the same.|
|Weight:||Weight is the force of gravity acting on an object pulling it towards the centre of the Earth or any other large mass. Weight is a force and so is measured in Newtons. The weight of an object varies depending on where you are (which planet etc and how far you are from it’s surface, the further away from the surface the smaller is your weight)..|
|gravitational field strength :||gravitational field strength, g, is the weight per unit mass. It is measured in Newtons per kilogram. It is the force of gravity or pull on each kilogram of mass.|
|Inertia:||Inertia is the property of an object which makes it hard to get an object to move, or to stop a moving object. Inertia varies with mass, so the bigger your mass the bigger your inertia..|
|Acceleration due to gravity:||All objects will acceleration due to gravity. On the Earth, close to the surface objects accelerate at 9.8 ms-2 .|
|Light year:||The distance light travels in a year equivalent to 9.46 .|
Light does not travel at an infinite speed. It takes time to travel. It is so fast that we do not usually notice, although out in space the distances involved are so big that light takes a reasonable amount of time to reach us.
Light travels at: 3 × 108 ms -1
Given that it takes 8 minutes for light to get from the sun, how far is it away is it from the Earth?
8 × 60 = number of seconds in minutes = 480s
Each second light travels 3 × 108m
d= v t
d= 3 × 108 × 480 = 1.44 ×1011m
How far does light travel in one year?
1 year = 365days
365days × 24 = 8760 hours
8760 ×60 × 60 = 31536000s in one year
Distance travelled in 1 year, d = v t
d = 3 × 108 × 31536000 = 9.46 × 1015 m in one year = one light year
The light year (ly) is the distance light travels in one year.
Light travels at 3 × 108 ms-1
|Source||Time taken for light
to reach us
|Moon||1.2 s||3.6 × 108||1.2 × 3 × 108|
|Sun||8 min||1.44 × 1011||480 × 3 × 108|
|Next nearest Star||4.3 y||4.07 × 1016||4.3 × 9.46 × 1015|
|Other side of galaxy||100 000 y||9.46 × 1020||100 000 × 9.46 × 1015|
|Andromeda galaxy||2 200 000 yr||2.08 × 1022||2 200 000 × 9.46 × 1015|
Many light sources produce a continuous spectrum containing all the wavelengths of visible light, e.g. an ordinary light bulb.
Some light sources emit only some wavelengths. They produce a line spectrum. Each line corresponds to a particular wavelength.
Each chemical element has its own line spectrum pattern(so it is like a finger print!)
Line spectra can be varied using a spectro-scope in the classroom.
Line spectra are used to tell us about the chemical composition of the stars.