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Are the forces acting on the weight lifter and the weights balanced or unbalanced?
The forces acting on the weight lifter and the weights are balanced when the weight lifter is holding the weights stationary. The force exerted by the weight lifter is equal and opposite to the force of gravity acting on the weights.
When A weight lifter in holding a weight of 120 kg on his shoulder for 30 s .calculate amount of work done.?
To calculate the work done, we need to know the distance over which the weight lifter held the weight. If we assume the weight lifter held the weight steady at shoulder height (about 1.5 meters), the work done would be Weight x Height = 120 kg x 1.5 m = 180 Joules.
What are the forces acting on a weight lifter and the weights?
(using squats for the sake of explanation) The lifter exerts an action force on the weight, which is in the opposite direction to gravity. The lifters shoulders also experience the reaction force (from the weight - otherwise, the weight would pass through the lifter or vice versa). The feet of the lift also experience a reaction force, which, combined with the shoulder-reaction force, is equal to the action force (Newton's Third Law). The feet also experience friction on the floor surface in opposite directions (which cancel out, so the lifter is stationary on the ground) :)
How does the of a 115kg barbell compare to the weight of the lifter?
The weight of a 115kg barbell is constant. The lifter's weight, however, will vary. If the lifter weighs less than 115kg, the barbell will be heavier relative to their weight. If the lifter weighs more than 115kg, the barbell will be lighter relative to their weight.
Why do weights store more energy when a weightlifter lifts them up from the ground?
You need to provide energy to lift the weight. If the weight falls or otherwise goes down, the energy is freed again - for example, it can drive a motor for a short while. It is therefore convenient to consider that there is stored energy in the lifted weight. More accurately, the energy is stored in the relation between the two attracting objects - in this case, planet Earth, and the weight.
Are the forces acting on the weight lifter and the weights balanced or unbalanced?
The forces acting on the weight lifter and the weights are balanced when the weight lifter is holding the weights stationary. The force exerted by the weight lifter is equal and opposite to the force of gravity acting on the weights.
What is the difference between a ballet dancer and a weight lifter?
a weight lifter has to have a surtain amount of fat to lift the weights and a ballet dancer has to be skinny and flexible
Weight lifter strains to lift a record amount without moving the weights from the floor A sportscaster lifts her microphone to report on the attempt Who is doing more work?
the Olympic Weight lifter because the weights are much heavier then the microphone
When A weight lifter in holding a weight of 120 kg on his shoulder for 30 s .calculate amount of work done.?
To calculate the work done, we need to know the distance over which the weight lifter held the weight. If we assume the weight lifter held the weight steady at shoulder height (about 1.5 meters), the work done would be Weight x Height = 120 kg x 1.5 m = 180 Joules.
Is a person's weight a function of their height... Why?
no people of the same height have diffrent weights, a given height maps to more than one weight
What are the forces acting on a weight lifter and the weights?
(using squats for the sake of explanation) The lifter exerts an action force on the weight, which is in the opposite direction to gravity. The lifters shoulders also experience the reaction force (from the weight - otherwise, the weight would pass through the lifter or vice versa). The feet of the lift also experience a reaction force, which, combined with the shoulder-reaction force, is equal to the action force (Newton's Third Law). The feet also experience friction on the floor surface in opposite directions (which cancel out, so the lifter is stationary on the ground) :)
How much does a pint of water weights in grams?
Mass can be measured in grams, not weight. The weight of 1 Imperial pint is approx 5.6 Newtons.
What is the height and weight of a starfish?
it is two feet and weights 11 lbs
How does the of a 115kg barbell compare to the weight of the lifter?
The weight of a 115kg barbell is constant. The lifter's weight, however, will vary. If the lifter weighs less than 115kg, the barbell will be heavier relative to their weight. If the lifter weighs more than 115kg, the barbell will be lighter relative to their weight.
How much total mechanical work does a weight lifter do in 10 repetitions of lifiting 200 kg to a height of 1m?
Zero
A concrete column has a volume of 565 m3 and a height of 20 m what is the maxmum weight expressed in newtons that the column can tolerate before fracturing?
area = volume/height 565m3/20m = 28.25m2 weight = max stress * area 20MPa * 28.25m2 = 565 MN (mega newtons or 10^6 newtons
How many weights come with this system?
This is a rather deluxe set intended for the serious lifter. You will get 20 pair of dumbbells, ranging in weight from 55-100 lbs.
