When Lillian hangs from a pair of gym rings,the upward support forces by the rings will always
A)each be half her weight.
B)each be equal to her weight.
C)add up to equal her weight.
D)add up to more than her weight.

Question

Quizplus · Accepted Answer

When Lillian hangs from a pair of gym rings, the upward support forces by the rings must add up to equal her weight to balance the downward force of gravity. This is due to Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. In this case, the action is the gravitational pull on Lillian's body, and the reaction is the support forces from the rings. Each ring doesn't need to support her entire weight individually (as in B), but together they must provide a force equal to her weight to keep her suspended. The forces do not necessarily have to be half her weight each (as in A) because the distribution of force can vary depending on how she positions herself, but the total must equal her weight. The forces will not add up to more than her weight (as in D) because that would imply an acceleration upwards, which is not the case when she is simply hanging.

When Lillian Hangs from a Pair of Gym Rings,the Upward