73.
mass m = 516 kg
radius , r = 155m
speed v = 29*1609/3600 = 12.96 m/s
mu = 0.3
answer C) 13 m/s
------------------
74.
centripetal acceleration a = v^2/r = 1.08 m/s ^2
Answer:: c.1.08 m/s^2
---------------------
75.
force F= ma = 516*1.08 = 560 N
answer:: a.560 N
-------------------------
76.
maximum static friction = mu*mg = 0.3*516*9.81 = 1520 N
Answer::: a.1.52 x 10^3 N
-----------------------
77.
yes
------------------
78.
v =sqrt(0.3*516*9.81) = 21.3 m/s
Answer::: b. 21.3 m/s
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