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

Idon’t quite understand this problem

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.