Connected Bodies - The Lift Problem (Edexcel A-Level Mathematics): Flashcards

Newton's second law of motion

$T = M(g + a)$

$N = m(g + a)$

Normal force $N$ exerted by lift floor

$N = mg$ (equals actual weight)

$N = m(g + a)$ (increases, feels heavier)

$N = m(g - |a|)$ (decreases, feels lighter)

$N = 0$ (weightlessness)

Weight $Mg$ (down), Tension $T$ (up)

Weight $mg$ (down), Normal force $N$ (up)

Heavier

Lighter

$T = M(g - a)$

Weightlessness