ShopReady Draft 2D · 51 s · narrated, with captions
A spring, by hand and let go: a short lesson
A spring, by hand and let go: a spring placed by its two ends; a lever dragged to its stop; then weight and the spring left to move it. One of the program's own built-in demonstrations, in its own words.
This is one part of a longer film
More in how to, and things that move
Lesson · 35 sA belt: a short lesson
A belt: two wheels selected and belted: they turn together, by their sizes. One of the program's own built-in demonstrations, in its own words.
Lesson · 42 sA cam and its follower: a short lesson
A cam and its follower: a follower set to ride on a cam's edge, up and down as the cam turns. One of the program's own built-in demonstrations, in its own words.
Lesson · 49 sA crank and a slide: a short lesson
A crank and a slide: three pins and a slide: a crank turns, and a block goes back and forth. One of the program's own built-in demonstrations, in its own words.
Lesson · 34 sA gear on a rack: a short lesson
A gear on a rack: a gear driving a rack, with nothing set but the driver. One of the program's own built-in demonstrations, in its own words.
Lesson · 1:08A lid on a gas strut: a short lesson
A lid on a gas strut: what it takes to hold a lid, read at its hinge; a strut that starts with that push; more push, and a chain that stops the lid where it is taut. One of the program's own built-in demonstrations, in its own words.
Lesson · 45 sA motor's strength: a short lesson
A motor's strength: a heavy lever: a motor too weak for it gives all it has and the lever sinks; a stronger one lifts it and says how hard it works. One of the program's own built-in demonstrations, in its own words.