- What kind of force does the Slinky use for its momentum?

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When exerting a steady pull of 450 N, a lorry travels at 80 km/h. Calculate A) the work done in 15 min and b) the power required? How do I find the LCD for these? 1. 3/(3x)+1/(x+4)=10/(7x) 2. 5/(X^2-4)+2/x=2/(x-2) 3. 2/x-(2+7)/(x^2-4)=5/x 4. 1/(x+4)+1/2=1/(x+4)? Is it true mountains get so big because they have no predators? Reason out as to why PPF concave in shape? Given numerical example to support your discussion (if you want to)? Ann and Barbara were comparing...?