medium · MCAT chem-phys
An 80 kg stunt performer stands on a stationary 20 kg platform on frictionless ice. The performer jumps horizontally off the platform.
If the performer's jump provides 500 J of total mechanical energy to the performer-platform system, what is the resulting speed of the platform?
- 7.1 m/s
- 5.0 m/s
- 6.3 m/s
- 2.5 m/s
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