C-10-Q128mediumsingle_mcqThe vertical drop of the break equals the standing piece, giving h1=?h_1 = ?h1=?aℓ⋅cos60∘\ell \cdot \cos 60^\circℓ⋅cos60∘bℓ⋅sin60∘\ell \cdot \sin 60^\circℓ⋅sin60