# 1. A 3-kg solid solid ball sits on a long platform of mass 12-kg and length...

###### Question:

1. A 3-kg solid solid ball sits on a long platform of mass 12-kg and length 18 m. There is friction between the solid ball and the platform (-0.3 and u- 0.4). There is kinetic friction of Ju-0.5 between the platform and the ground. 1-1). You come upon this system moving at 10m/s with a horizontal force F- 75N is acting on it. a). What is the acceleration of the platform relative to the ground? b). What is the acceleration of the solid ball relative to the ground? c). What is the acceleration of the solid ball relative to the platform d). What is the force of friction between the solid ball and the platform? 1-2). Now the applied force is increased to F-141N. a). What is the acceleration of the platform relative to the ground? b), what is the acceleration of the solid ball relative to the ground? c). What is the acceleration of the solid ball relative to the platform. 1-3). If the solid ball starts at the right end of the platform, how far does it travel the ground) before it falls off?

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