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If a weight lifter lifts a barbell and then sets it down is any work done?
Wiki User
∙ 15y ago
Answer: It depends upon your definition of "work". Assuming the lifter put the barbell back exactly where and how it was at first, then there was no work done in the physics context. If you mean manual labor, then yes, some work was done.
Wiki User
∙ 15y ago
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A weight lifter lifts 2 weights of 200 newtons each up to a height of l meter. what work has he done?
w=fd w=200x1work=200 joules
What is the amount of work done by a weight lifter in holding a weight of 100kg on his shoulder for 40 seconds?
While just holding the weight on his shoulder, the weight lifter does no work! For work to be done, the mass must be moved through a distance … No Movement, No Work! (but don't tell that to a weight lifter …)
What forms of energy are used when someone lifts a barbell to momentary muscular failure?
I don't know what you mean by momentary muscular failure. Surely if this happens he won't succeed in lifting the barbell? Lifting a barbell or indeed any muscular work done involves chemical changes in the muscles which provide the energy required, in this case raising the weight against the force of gravity. The energy used to lift a weight m kg a height of h meters is 9.81 x m x h joules.
How much work is done by a weight lifter when he holds a weight of 80kgs on his shoulder for two minutes?
none. work is done when a force is applied thru a distance. holding something stationary does no work.
How much work is done by a weight lifter when he holds a weight of 80Kg on his shoulders for two minutes?
none. work is done when a force is applied thru a distance. holding something stationary does no work.
A weight lifter lifts a mass m at contant speed to a height h in time t how much work w is done by weight lifter?
The weight of the mass 'm' is (m g) .That's the minimum force he has to exert in order to balance the force of gravity andlift the weight vertically. If he exerts more force than (mg), the weight will accelerateup, and he'll just wind up either coasting in the middle, or else retarding it at the top.So the eventual outcome is just applying the force (mg) through the distance 'h'.The time taken for the maneuver has no effect on the work done. It's just the amount ofpotential energy gained by the bar-bell due to its increased elevation.Work = [ (force) times (distance) ] or [ (weight) times (height) ].W = m g h
What day was the dead lift competition in the 2012 Olympics?
Weightlifting competitions at the 2012 Summer Olympics in London were held from 28 July to 7 August 2012 and done by weight class and by Men and Womens for the 15 events Total score was the sum of the lifter's best result in each of the snatch and the clean and jerk, with three lifts allowed for each lift
What are some Examples of Anatomical Adaptations?
Its a phase of training that is usually done early on. Anatomical adaptations focus on circuit training with the load intensity being around 40% to 60% of a 1RM. You can do body weight exercises, medicine ball/ dumbbell or barbell work. Its all supplemental and core lifts, nothing technical. Here is an example: -Body weight squat -Push ups -Back extension -Sit ups -Calf raises
Is it easy to adjust or replace a lifter on a 97 Mercedes or should you have a mechanic do it?
valve adjustment should be done only by someone with experance,lifter replacment only by a mechanic ether done wrong will be very costly.
A mother lifts a 15 kg child 1.2 m. How much work is done Remember the force of an object's weight mass and times gravity.?
176 J
A weightlifter lifts a 500N barbell a distance of 2m how much work is done on the barbell?
100 n 25 w 400 w 100 w
How long is a long tongue bar?
Each barbell is scaled to the size of the tongue to be pierced therefore there is no "actual size" barbell for tongues, this is why you need to have the piercing done by a professional body piercer who will scale and measure the tongue and place the correctly sized barbell into the piercing.
