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13. You are pushing your friend in his wheelchair. You are both taking his dog, Wrathbone, to the vet. Wrathbone is 5 kg and
is sitting in your friend's lap. You decide to increase the wheelchair's acceleration to 7 in order to get up a steep ramp.
If your friend has a mass of 46 kg and his wheelchair has a mass of 16 kg. What is the force you are applying?
338 N
469 N
35 N
O 322 N