Wiki User
∙ 12y ago3 more times
Wiki User
∙ 12y agowell you know i have the same home work con physics haha and it's chapter 8 right second question haha. i think; if you want to lift a barbell three times as high you have to give three times the work (W)
This weightlifter did work on the barbell to lift it over her head.
The work done in lifting the barbell is given by the formula: Work = force x distance = 500 N x 2.2 m = 1100 J. The potential energy of the barbell at this height is equal to the work done, so it would also be 1100 J.
5105.8 J
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.
The work done is zero, because holding the barbell over your head does not involve moving it vertically. Work is only done when there is a displacement in the direction of the force being applied.
Obviously will does more work because Ben does nothing.
To calculate how much work it takes to lift the barbell, you will need to know the height you are lifting it to (distance over which the force is applied) and the angle at which you are lifting the barbell (if not directly against gravity). These factors will allow you to calculate the work done against gravity using the formula: Work = Force x Distance x cos(angle).
Any kind of deadlifts will also work your traps. .
If we are talking about an industrial piercing, yes you need two piercings. however you can still wear a barbell in one piercing provided that it is fitted to work in that single piercing.
The potential energy of the barbell when it is lifted is equal to the work done to lift it against gravity. It is given by the formula: potential energy = mass * gravitational acceleration * height. The potential energy stored in the barbell can be converted back into kinetic energy when the barbell is lowered.
you get the sum and times with the subject total and times