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One might find the directions on how to make a cup lifter on sites such as eHow. Another way one might find out how to make a cup lifter would be to look in books at ones local library.

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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.


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.


How does the force of the lifter compare with the weight of the barbell at different stage of the lifter?

At the beginning of the lift, the lifter's force is greater than the weight of the barbell to overcome inertia and initiate movement. During the middle of the lift, the lifter's force is equal to the weight of the barbell to maintain constant velocity. Towards the end of the lift, the lifter's force is less than the weight of the barbell due to deceleration and control.


What are the forces acting ona weightlifter and weights?

The main forces acting on a weightlifter lifting weights are the gravitational force pulling the lifter and weights downward, the normal force supporting the lifter from the ground, and the force exerted by the lifter to lift the weights against gravity. Additionally, there may be frictional forces between the lifter's body and the weights or the ground.


How much work does the weight lifter do The weight lifter applies a force of 1300 N to a dumbbell does not move?

If the dumbbell does not move, then the work done by the weight lifter is zero. This is because work is defined as force applied over a distance in the direction of the force, and if there is no movement, no work is done.