Physics, 19.12.2019 05:31 nauticatyson9
You apply a horizontal force of 200n against a 50kg couch. the force of friction between the couch and the floor is 180n. if the couch is pushed 2 metres, the kinetic energy gained by the couch is: a) 0 b) 40 j c) 100 j d) 360 j d) 400 j
Answers: 3
![0+(200-180)*2= Ek2\\Ek2=20*2= 40 [J]](/tpl/images/0425/5959/caaa7.png)
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