Oct. 24th continued
Question #2 Answered....Will a rocket accelerate in the vacuum of space...without the Earth to push against 2012
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Question #3 A fan on the cart is blowing at the sail when I let go...2012
Preparing to answer question #4 .... two 10 Newton masses pulling in opposite directions on a spring scale...what will the spring scale read???? 2012
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Big Pictures:
1. Newton's 3rd Law in a tug of war is found in the two contact points: Whichever team the ground can push back the most on and whichever team the rope can push back the most on. Thus the team with the socks on the floor lost over the team with the tennis shoes on and/or the team with gloves that didn't slip on the rope wins over the team whose hands slip on the rope.
2. When a rocket does a thrust, the thrust has to push against the rocket to exit the rocket thus accelerating the rocket in the opposite direction. Example: If you are standing on a frictionless skate board near a wall ... you cannot move without pushing against the wall. You cannot kiss without being kissed.
3. If you are on a sailboat with no wind...using a fan to blow on the sails does not work as the action of the fan air going one direction is negated by the contact of the base of the fan on the same sailboat. However, if the fan was on the shore (not connected to the boat like the wind is) then the reaction would be on the land and the boat would go forward.
4. If you are pulling a cord connected to a wall or floor, the wall or floor has to be pulling back with the same force. When you weigh yourself or walk, the floor has to push back with an equal force or you would fall through the floor. Thus a 10 N weight pulling on a spring scale would read the 10 N that each side is pulling in opposite directions to keep the spring scale from accelerating.
2. When a rocket does a thrust, the thrust has to push against the rocket to exit the rocket thus accelerating the rocket in the opposite direction. Example: If you are standing on a frictionless skate board near a wall ... you cannot move without pushing against the wall. You cannot kiss without being kissed.
3. If you are on a sailboat with no wind...using a fan to blow on the sails does not work as the action of the fan air going one direction is negated by the contact of the base of the fan on the same sailboat. However, if the fan was on the shore (not connected to the boat like the wind is) then the reaction would be on the land and the boat would go forward.
4. If you are pulling a cord connected to a wall or floor, the wall or floor has to be pulling back with the same force. When you weigh yourself or walk, the floor has to push back with an equal force or you would fall through the floor. Thus a 10 N weight pulling on a spring scale would read the 10 N that each side is pulling in opposite directions to keep the spring scale from accelerating.