Both the force acting on an object and the time for which it is exerted contribute to the change in momentum: they are...

Classroom Activity 14-16

This is a quick puzzle, best done as a physical presentation, to compare the momentum of two very dissimilar balls after they...

Classroom Activity 14-16

Things that are already moving require a force acting on them for a certain duration. You can't change the momentum without...

Classroom Activity 14-16

This experiment is to get a feeling for just how small a joule is–how little mechanical working needs to be done over just how...

Classroom Activity 14-16

The model used to add or take away momentum explicitly accumulates the force over time and so allows you to see that it is...

Classroom Activity 14-16

Here you can investigate the trade-off between the pair of compensated quantities: force and distance, the combined action of...

Classroom Activity 14-16

Here we're looking at how stretching space predicts the change in recession velocity of galaxies. If you stretch a piece of...

Classroom Activity 14-16

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