“total recall”, a factory worker named douglas quaid (starred colin farrell) goes to work everyday using a shuttle, which travels in a tunnel drilled through the center of the earth. neglecting rotational efects, show that the shuttle’s motion due to the gravitational force alone is simple harmonic if we assume earth has uniform density. estimate how much time douglas quaid spends everyday in commute?

Aspecial electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at an amusement park. the sensor measures the magnitude of the normal force that the seat exerts on a rider. the loop-the-loop ride is in the vertical plane and its radius is 23 m. sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 740 n. at the top of the loop, the rider is upside down and moving, and the sensor reads 370 n. what is the speed of the rider at the top of the loop?

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

Name the non metal condut electricity