Xiao Zhang uses a horizontal pull force of 30n to lift an object with a weight of 100N and make it move 5m horizontally. After that, the pull force does work J and the gravity does work J The explanation of gravity work,

Xiao Zhang uses a horizontal pull force of 30n to lift an object with a weight of 100N and make it move 5m horizontally. After that, the pull force does work J and the gravity does work J The explanation of gravity work,

The pulling force is 150j (formula FS, pulling force multiplied by distance)
Gravity is 0j, because the formula GH, gravity times distance, is 100 × 0 = 0j