[ALI ALZAHRANI]

المشاركة الأصلية كتبت بواسطة روزاليندا&MJ السلام عليكم دكتور ممكن عندي سؤال بسيط عبارة عن particle moves along x axic . Does the kinetic energy of the particle increase decrease, or remain the same if the particle's velocity changes (a) from -3 to -2. b) -2 to2 (c)In each situation, is the work done on the particle + or- or zero

(a)

K = Kf -Ki = 0.5m (vf^2 -vi^2) = 0.5*(4-9) = -2.5m

Decreasing


W = K = -2.5m

Negative

(b)

K = Kf -Ki = 0.5m (vf^2 -vi^2) = 0.5*(4-4) = 0

Same

W = K = 0

zero