One crate, one rope, four different pulls. The arrows tell you which way it goes.
A 20-kg crate hangs at the end of a long rope. Find its acceleration when the tension in the rope is (a) 250 N, (b) 150 N, (c) zero, (d) 196 N.as printed, page 52
Tap any symbol, here or in a formula, to see what it is and its value.
Twenty kilograms, a heavy suitcase. Everything in this problem is measured against this one number.
A gentle lift, about a quarter of g. A crane hoisting a load feels like this at the start.
A slack rope does nothing. The crate falls as if there were no rope, which is what free fall means.
Press play and it reads straight through, scrolling as it goes. Space pauses. ← → move a step. ▶ on a step plays from there.