Biomechanics

posted by .

An 88.9 kg weight lifter is required to perform a snatch movement for their final lift in a weight lifting competition. The standard weight lifting bar is 20 kg and the load attached to the bar was in the form of 6 x 20 kg weight discs, 2 x 10 kg weight discs, 2 x 5 kg weight discs and 2 x 1.25 kg weight discs, with the discs evenly distributed on either side of the bar. The tallest weight disc was 50 cm and the bar was loaded in the centre of the tallest disc and then each subsequent disc was loaded. The snatch lift required the fully loaded bar to be moved from the floor to the competitors lifting height of 2.72 m. The successful lift was completed in 1.48 s. At the completion of the lift the weight lifter is standing on both feet with the load above the head, the weight lifters specialized shoes contact the ground with an area of 13 cm2.


(a) What was the weight of the weight lifter?

(b) How much work was done by the weight lifter?

(c) How much power was developed by the weight lifter?

(d) How much momentum did the lift produce?

(e) When the weight was held overhead what was the potential energy?

(f) What was the kinetic energy at this point?

(g) How much pressure is being exerted on the weight lifter as they stand with the load?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Thermodynamics

    In exercising, a weight lifter loses 0.100 kg of water through evaporation, the heat required to evaporate the water coming from the weight lifter's body. The work done in lifting weights is 1.30 x 10^5 J. (a) Assuming that the latent …
  2. Physics HELP!!!!!!!!

    In exercising, a weight lifter loses 0.100 kg of water through evaporation, the heat required to evaporate the water coming from the weight lifter's body. The work done in lifting weights is 1.30 x 10^5 J. (a) Assuming that the latent …
  3. Physics

    The figure below shows a standard man intending to do reverse curls in a gym (standing up with Tension up, weight of arm down and force down). He holds his arms straight, using an overhand grip to hold the bar. If the mass of the bar …
  4. PHYSICS

    A box is lifted with a pry bar, by slipping the bar under the box and lifting up on the bar. If the pry bar is 2m in length and it is grasped at the end, and the box is located at the opposite end, the fulcrum, with its center of gravity …
  5. PHYSICS

    A box is lifted with a pry bar, by slipping the bar under the box and lifting up on the bar. If the pry bar is 2m in length and it is grasped at the end, and the box is located at the opposite end, the fulcrum, with its center of gravity …
  6. PHYSICS please HELP

    A box is lifted with a pry bar, by slipping the bar under the box and lifting up on the bar. If the pry bar is 2m in length and it is grasped at the end, and the box is located at the opposite end, the fulcrum, with its center of gravity …
  7. maths

    2. A bar of uniform section is 81.4cm long and weighs 4.45 kg. A weight of 12.8 kg is suspended from one end. The bar weight combination is to be suspended from a cable attached at the balance point. a)Determine how far from the weight …
  8. Physics

    A uniform bar length of 2.0m and weight 1000 N has its center of gravity at its center. The bar is pivoted 0.5m from the right, and supports a weight of 200N on the opposite end (left end). What is the weight needed at right end of …
  9. Physics

    The diagram shows a weightlifter in the initial stages of his lift. He lifts two 70 kg masses connected to a 10 kg bar. In addition, there are two upward forces : 795N and 810N a. Calculate the total weight that he is lifting?
  10. Physics

    A weight lifter is bench-pressing a barbell whose weight is 710 N. He raises the barbell a distance of 0.65 m above his chest then he lowers it at 0.27 m. Determine the work done on the barbell by the weight lifter during:a.)the lifting …

More Similar Questions