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Q:

1. trailer measures 9 feet tall (ground-to-top) and 6 feet wide. It weighs 5 tons. The c.m. point is 4.5 ft. above the ground. What is the smallest radius curve this trailer can round at 60 mph without tipping?

A: convert to metric: mass=4539.26kg; v=26.82m/s; height=2.7432m; width=1.8288m; central mass=1.3716m

I was thinking about using the equation: Central Force=m*(v^2/r). However, I do not have the Central force….is there a way to get that or am I on the wrong track?

Q: A clear vinyl “suction cup” is stuck to a vertical glass door on a shower stall. The cup measures 1.5 inch in diameter. The coefficient of static friction between glass and clear vinyl is 0.4. The cup has a hook on it from which items may be hung. What is the maximum weight in lbs that can be hung from the cup if the cup is not to slide down the door?

A: A=pi r^2= pi(.77^2)=1.75in^2 14.7=psi air inside the suction cup

F=pA

F=14.7*.4*1.72in^2=10.11lb