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ر“A 40-kg skateboarder on a 3-kg board is training with three 5-kg weights. Beginning from rest, she throws the weights horizontally one at a time from her board. The velocity of each weight is 7 m/s relative to her and the board after it is thrown. How fast is she propelled in the opposite direction after throwing the third weight? Assume that the board rolls without friction.”
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لو سمحت اذا ممكن تساعدني بحل هذي المسائل جزاك الله خيرا
http://www.phys4arab.net/vb/showthread.php?t=73998 |
a ball was thrown vertically upwards from 1 meter above the ground it is speed is 1.5 m/s, find: 1. It's Height, when it's speed is equal to 10 m / s ? 2. The Maximum height of the ball ? ولم أنسكَ بالتأكيد بدعوة صالحة لك ولوالديك بظهر الغيب رحهمها الله وجعل مثواهما الجنة |
| الساعة الآن 02:58 |
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