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**PLEASE HELP**

**A 68 kg acrobat jumps from a 2 meter ledge on to a trampoline. If the acrobat bounces off the trampoline with a velocity of 10.6 m/s over a contact time of 1.02 seconds, what force did the trampoline exert on the acrobat?****Well I ve tried to do it multiples times, using the formula Vf=Vi+a*t and solving for a. Then I substitute in the Force equation but I get the wrong number and my teacher told me is the wrong equation but i don't know what else to use.**