A slope makes part of gravity pull downhill. Raise this empty practice ramp: a steeper slope asks for more hold-back.
Touching surfaces can push back without sliding—but only up to a limit. Try one flat, unnamed practice pair.
The pair is ready to push back.
Now drive one mystery pair. Amber is what the slope asks for. Teal is the most the pair can supply. The block holds through a tie.
Mystery pair circle can supply three marks.
New covered samples. Flat pull tests measured each limit. Now equal blocks wait behind equal pins on the same locked tilt.
AGRIP 2
COVERED SAMPLE
BGRIP 5
COVERED SAMPLE
A is left · B is right · both pins are down
Same 3-mark request · A can hold 2 · B can hold 5
At the same locked tilt, what happens when both starting pins lift?
Lift both pins. Watch A and B.
Move all the way to see the full comparison.
