learn more remarks the other solution, d = -0.437 m, can be rejected because d was chosen to be a positive…

learn more remarks the other solution, d = -0.437 m, can be rejected because d was chosen to be a positive number at the outset. a change in the acrobats center of mass, say, by crouching as she makes contact with the springboard, also affects the springs compression, but that effect was neglected. shock absorbers often involve springs, and this example illustrates how they work. the spring action of a shock absorber turns a dangerous jolt into a smooth deceleration, as excess kinetic energy is converted to spring potential energy. question is it possible for the acrobat to rebound to a height greater than her initial height? explain. (select all that apply.) no. the kinetic energy that the acrobat gains on the way down is converted entirely back into potential energy when she reaches the initial height. yes. elastic energy is always present in the spring and can give the acrobat greater height than initially. yes. the acrobat can bend her knees while falling and then straighten them as if jumping when bouncing upward again. yes. the acrobat can provide mechanical energy by pushing herself up while in contact with the springboard. no. there is no external source of energy to provide the potential energy at a greater height. consider whether the acrobat standing on the ground, without any spring at all, could jump to a greater height than she had initially when simply standing in place. then apply the same idea to what the acrobat could try on a trampoline.

learn more remarks the other solution, d = -0.437 m, can be rejected because d was chosen to be a positive number at the outset. a change in the acrobats center of mass, say, by crouching as she makes contact with the springboard, also affects the springs compression, but that effect was neglected. shock absorbers often involve springs, and this example illustrates how they work. the spring action of a shock absorber turns a dangerous jolt into a smooth deceleration, as excess kinetic energy is converted to spring potential energy. question is it possible for the acrobat to rebound to a height greater than her initial height? explain. (select all that apply.) no. the kinetic energy that the acrobat gains on the way down is converted entirely back into potential energy when she reaches the initial height. yes. elastic energy is always present in the spring and can give the acrobat greater height than initially. yes. the acrobat can bend her knees while falling and then straighten them as if jumping when bouncing upward again. yes. the acrobat can provide mechanical energy by pushing herself up while in contact with the springboard. no. there is no external source of energy to provide the potential energy at a greater height. consider whether the acrobat standing on the ground, without any spring at all, could jump to a greater height than she had initially when simply standing in place. then apply the same idea to what the acrobat could try on a trampoline.

Answer

Brief Explanations:

According to the law of conservation of energy, without an external energy - source, the total mechanical energy of the acrobat - spring system is conserved. When the acrobat falls and rebounds, the kinetic energy on the way down is converted back to potential energy at the initial height. Without additional external energy, it's impossible to reach a greater height. Also, any internal actions like bending knees or using the spring's elastic energy are already accounted for within the system's energy conservation.

Answer:

No. The kinetic energy that the acrobat gains on the way down is converted entirely back into potential energy when she reaches the initial height. No. There is no external source of energy to provide the potential energy at a greater height.