What similarities can be seen in the motion of these five objects?

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hereitgoes
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Do any of these five objects move in similar ways? Which ones? What do they have in common?
-Oscillating pendulum
-dynamics cart rolling up and down an incline
-student jumping into the air
-mass oscillating at the end of a spring
-ball tossed into the air



My guess would be that they all move in similar ways?? I don't think I really understand what I'm being asked here. Any help would be awesome, thanks guys.
 
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Welcome to PF!

Hi hereitgoes! Welcome to PF! :wink:
hereitgoes said:
My guess would be that they all move in similar ways?? I don't think I really understand what I'm being asked here.

hmm :smile: …

students don't bounce! :smile:​

but i think they want you to compare the forces (or accelerations) :wink: