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26 Nov 2019
1)In an experiment on stopping distance, a truck drives 60mph,then the brakes are put on hard, so that the truck's wheelslock,and the truck skids to a stop. When the truck is empty, ithas amass of 3000 kg, and it skids to a stop in 30 m. Whatdistance (inm) does the truck skid when it is loaded with a2,027-kg mass?(Ans: 3.00x10^1) 2) The terminal velocity of a 0.00008-kg drop is 1.5m/s.Assuming a drag force F_D = -bv, what is the value of theconstantb (in kg/s)? (Ans: 5.23x10^ -4) 3) The drag force on large objects moving through air ismorenearly F_D = -bv^2. For this quadratic dependence on v, what isthevalue of the constant b (in Ns^2/m^2) if a 79-kg sky diver hasaterminal velocity of 51 m/s? (Ans: 2.98*10^-1)
1)In an experiment on stopping distance, a truck drives 60mph,then the brakes are put on hard, so that the truck's wheelslock,and the truck skids to a stop. When the truck is empty, ithas amass of 3000 kg, and it skids to a stop in 30 m. Whatdistance (inm) does the truck skid when it is loaded with a2,027-kg mass?(Ans: 3.00x10^1)
2) The terminal velocity of a 0.00008-kg drop is 1.5m/s.Assuming a drag force F_D = -bv, what is the value of theconstantb (in kg/s)? (Ans: 5.23x10^ -4)
3) The drag force on large objects moving through air ismorenearly F_D = -bv^2. For this quadratic dependence on v, what isthevalue of the constant b (in Ns^2/m^2) if a 79-kg sky diver hasaterminal velocity of 51 m/s? (Ans: 2.98*10^-1)
Lelia LubowitzLv2
2 Oct 2019
