Midterm Exam (3) Begin Dale: 6/21/20176 00:00 PM Due Date: 6/21/2017 I159.00 PM
ID: 1628032 • Letter: M
Question
Midterm Exam (3) Begin Dale: 6/21/20176 00:00 PM Due Date: 6/21/2017 I159.00 PM End Date: 6 2017 11:59.00 PM coefficients of A with mass m 1000 kg is driving around acircular curve of radius r 770 when it starts to rain. The static friction between the track and tires is 055 when wet. dry and 0.26 when D A 33% Part a write an expression for the maximum magnitude ofthe force of static friction Facting on the truck ifA, is the co Grade Sum 7 8 9 per atte detailed view 33% Part a) What is the maximum tangential speedthat the truck can corner at without slipping when dry in m/s? 33% Part (c) What is the maximum take the tangential speed when wet in m/s?Explanation / Answer
Expression for the maximum magnitude of static friction acting on the truck is = mgµS
where m = mass of truck = 1000 Kg
g = 9.8 m/s2
and µS = 0.55
Frictional force = 1000 x 9.8 x 0.55 = 5390 N