The weightlifter jerks the barbell up Compare the mechanical work he does in the first and second half of the lift.

The person lifts the barbell to a certain height. In the first half of the height, the mechanical work of the applied force is greater than in the second, since at the beginning of the ascent the force applied to the bar is greater than the weight of the bar.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.