[Einstein Uae]

السؤال الثامن

a) from law of conservation of energy

m1*g*h = m2 *g*h + 0.5*m1*v^2 + 0.5*m2*v^2

0.5 * ( m1 + m2 ) * v^2 = ( m1 - m2 ) * g*h

so the speed is

v = UnderSquare [ 2*g*h*( m1 - m2 ) / ( m1 + m2 ) ]


b)

Again from the law of conservation

m2*g*h + 0.5*m2*v^2 = m2*g*H

So H is

H = (g*h + 0.5*v^2) / g

إن شاء الله فهمتي و إذا بغيتي توضيح أكثر آمري