Please Help with 1b and 2.

1. A young child pulls a wagon with a force of 80 N. a) What is the net force if the force of friction resisting the motion of the wagon is 12 N? > Fapp = BON Fret = BON - For 12N= 6BN 12N1 68N 2 marks b) If she uses 80 N to pull the wagon through a mud puddle, and the net force on the wagon is now 38 N. what new friction force acts on the wagon? Fapp = BOW bi 2 marks 2. A rocket weighs 2.0 x 10' N. Its engines exert 2.5 x 10' N of force at lift-off. What is the net force applied to the rocket? 2) 2 marks