This may look like an ordinary guy, but he's doing good physics in zero gravity.
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Second Law
Starting and stopping - pushing and pulling. Sometimes it's easy and sometimes it's difficult. What's happening in these examples?
Two cars about to collide
Man experimenting in zero gravity
People pushing a car
If you wanted to make car crashes less dangerous would you alter the speed limits or alter the cars? Here is a crash test - what's happening?
If the car has broken down it's good to have friends! So remember, when you start driving, always take some mates along in the back to push you around, saves on fuel too!
Have a look at some or all of these movies - they each show different aspects of forces and movement. You can just watch the movies or use the controls to delve a bit deeper.