1. susan pushes her dad, david, on an ice rink with a force of 30 n. she weighs 45 kg and her dad weighs 100 kg. what are the accelerations of susan and david?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.