الـ3 الأسئلة المتبقية من مسائل السقوط الحر والتي قام الدكتور باعطاءها لنا , اتمنى منك حلها لأتاكد من صحة حلي :
1 - a ball is thrown vertically upward . It returns to its starting point after 4 sec . Calculate :
A - the initial velocity of the ball
b - the maximum height the ball rise
×××
2 - a student threw a set of keys vertically upward to his brother in a window 4.0 m above . The keys are caught 1.5 sec later by the brother's outstretched hand :
A - what's the initial velocity when the keys were thrown ?
B - what was the velocity of the keys just before they were caught ?
××××
3 - a ball is thrown vertically upward . It returns to its starting point after 4 sec . Calculate :
A - the initial velocity of the ball
b - the maximum height the ball rise
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شاكر لك مفدما , وأعتذر عن كثرة الأسئلة , أستاذ .