Charlie stands on a station and the full London bound through train rushes past. Alice, sitting on the London-bound train...

Physics Narrative 14-16

Just push for a while, causing a change in the velocity: that adds to the quantity of motion.

Physics Narrative 14-16

This idea that something is given to an object when you push or pull on it and affect its motion is common. This is often said...

Physics Narrative 14-16

Throw a tennis ball harder and it leaves your hand faster. No surprise there–we're just describing an everyday occurrence in...

Physics Narrative 14-16

So far momentum looks like just one measure of motion amongst many (velocity, energy in the kinetic store)–useful for some...

Physics Narrative 14-16

So, momentum looks to be a useful measure of motion. What then of the energy associated with the motion of an object–and by...

Physics Narrative 14-16

Filling or emptying kinetic stores necessarily involves speeding up or slowing down mass. It's an accumulation of the power in...

Physics Narrative 14-16

Here is a particular, but common, example where energy sloshes from store to store as a result of the actions of forces on...

Physics Narrative 14-16

Alice, Bob or Charlie can record the velocity of an object. Combining these measures with the mass of the object (invariant–so...

Physics Narrative 14-16

Devices for lighting a room switch power to a particular pathway: the heating by radiation pathway. If the source emits at...

Physics Narrative 14-16

Now let's work out how the trip times and frequencies combine to predict the different fixed patterns of displacements. These...

Physics Narrative 14-16

There are two cataclysmic possibilities for rearrangements of nuclei that result in a movement towards a lower-energy, more...

Physics Narrative 14-16