2 địa điểm cách nhau 180km có 2 xe khởi hành cùng 1 lúc, chạy ngược chiều nhau . xe từ Aco1 vận tốc v1=36km/h, xe từ B có vận tốc v2=54km/h. chọn địa điểm A làm gốc tọa độ, chọn gốc thời gian lúc xe khởi hành, chiều từ A đến B là chiều dương. thời điểm 2 xe tới gặp nhau và tọa độ của địa điểm 2 xe gặp nhau là bao nhiêu

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?

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus