Một vật được thả rơi không với vận tốc đầu, khi vừa chạm đất có vận tốc 10 căn 2, coi như vật rơi tự do, lấy g= 10m/s^2a) xác định độ cao nơi thả vậtb) tính thời gian rơi của vật

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.

Ineed to answer this problem but i lack in knowledge, what should i study to answer this problem? i have never used derivatives in a physics problem so i'm not sure what's happening and i can't find videos explaining.

This is the rate of acceleration of any object falling under the sole influence of gravity.