Forces and Motion

Big Ideas: More info...

  • Objects interact with each other (by contact or at a distance) - giving rise to pairs of forces. 
  • A force acting on an object causes its velocity to change; without a net force, its velocity is constant.

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Time
Forces and Motion IOP RESOURCES

The time-travelling astronaut

The time-travelling astronaut: Russian cosmonaut Sergei Krikalev holds the record for time spent in orbit around the Earth...

Stories from Physics 11-14 14-16

Time
Forces and Motion IOP RESOURCES

It has(n’t) been a long day

The length of the day has not been constant throughout the Earth’s history. For the last 2,700 years, the length of a day has...

Stories from Physics 11-14 14-16

Circular Motion
Forces and Motion IOP RESOURCES

The rogue asteroid

An asteroid passing close to Earth may have its orbit deflected in such a way as to cause a collision in the future; regions...

Stories from Physics 11-14 14-16

Circular Motion
Forces and Motion IOP RESOURCES

Yo-yo satellites

Some satellites are deliberately spun about an axis perpendicular to their orbital plane in order to prevent their position...

Stories from Physics 11-14 14-16

Mass
Forces and Motion IOP RESOURCES

​​​​​​​Is it possible to jump into orbit?

A paper has considered whether it is possible to jump into orbit on a body of small mass, such as Mars’s moon Deimos. The...

Stories from Physics 11-14 14-16

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