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Software Requirements


Android iOS Windows MacOS
with best with Chrome Chrome Chrome Chrome
support full-screen? Yes. Chrome/Opera No. Firefox/ Samsung Internet Not yet Yes Yes
cannot work on some mobile browser that don't understand JavaScript such as.....
cannot work on Internet Explorer 9 and below



Juan M. Aguirregabiria (; lookang; tina

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Sample Learning Goals

Students should be able to:

  1. show an understanding of the concept of a gravitational field as an example of field of force and define the gravitational field strength at a point as the gravitational force exerted per unit mass placed at that point.
  2. recognise the analogy between certain qualitative and quantitative aspects of gravitational and electric fields.
  3. recall and use Newton’s law of gravitation in the form \( |F| = \frac{GM_{1}M_{2}}{r^{2}} \) 
  4. derive, from Newton’s law of gravitation and the definition of gravitational field strength, the equation g=GMr2for the gravitational field strength of a point mass.
  5. recall and apply the equation g=GMr2 for the gravitational field strength of a point mass to new situations or to solve related problems.
  6. show an understanding that near the surface of the Earth g is approximately constant and equal to the acceleration of free fall.
  7. define the gravitational potential at a point as the work done per unit mass in bringing a small test mass from infinity to that point.
  8. solve problems using the equationϕ=-GMrfor the gravitational potential in the field of a point mass.
  9. analyse circular orbits in inverse square law fields by relating the gravitational force to the centripetal acceleration it causes.
  10. show an understanding of geostationary orbits and their application.

For Teachers




Other Resources

  1. by ukukuku

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