7. A stonemason drags a marble block across a floor by pulling on a rope attached to the block. The block isnot necessarily in equilibrium. How are the various forces related? What are the action-reaction pair?8. You want to move a 500-N crate across a level floor. To start the crate moving, you have to pull with a 230N horizontal force. Once the crate "break loose" and starts to move, you can keep it moving at constantvelocity with only 200 N. What are the coefficients of static and kineticfriction?9. A small car with mass 0.800 kg travels at constant speed on the inside of atrack that is a vertical circle with radius 5.00 m (Fig. E5.42). If the normalforce exerted by the track on the car when it is at the top of the track (pointB) is 6.00 N, what is the normal force on the car when it is at the bottom ofthe track (point A)?v-12.0 m/s5.00 mv 12.0 m/s

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7. A stonemason drags a marble block across a floor by pulling on a rope attached to the block. The block is in equilibrium. How are the various forces related? What are the action-reaction pair? not necessarily