An amusement park ride consists of airplane shaped cars attached to steel rods. Each rod has a
Channel: Doubtnut
Date: 2020-07-26

An amusement park ride consists of airplane shaped cars attached to steel rods. Each rod has a length of `20.0 m` and a cross-sectional area of `8.00 cm^(2)`. Young's modulus for steel is `2 xx 10^(11) N//m^(2)`.  a. How much is the rod stretched (in `mm`) when the ride is at rest ? (Assume that each car plus two people seated in it has a total weight of `2000 N`.)  b. When operating, the ride has a maximum angular speed of `sqrt(19/5) rad//s`. How much is the rod stretched (in mm) then?