A pole AB of length 10.0m and weight 800N from the end A and lies on horizontal ground. The end B is to be lifted by a vertical force applied at B calculate the least force that is required to do this.
Balancing the pole at A with tbe weight acting at cebtre of gravity 800(4) equals Force at B times 10
Then force at B equals 3200 divided by 10 equals 320N