The same push, three different carts. Watch how far each gets.
A force acts on a 2-kg mass and gives it an acceleration of 3 m/s². What acceleration is produced by the same force when acting on a mass of (a) 1 kg? (b) 4 kg? (c) How large is the force?as printed, page 51
Tap any symbol, here or in a formula, to see what it is and its value.
About the weight of a big apple and a half sitting in your hand. Tiny, and it still moves a 4 kg mass.
After one second it is doing 6 m/s, a fast run. Twice what the 2 kg got, because there is half as much to move.
A slow, steady creep. In two seconds it has gone 3 m while the 1 kg has gone 12 m.
Press play and it reads straight through, scrolling as it goes. Space pauses. ← → move a step. ▶ on a step plays from there.