Which of these forces could speed up a baseball?

a) applied and frictional forces

b) applied and gravitational forces

c) frictional and gravitational forces

If the speed of a particle triples ,by what factor does its kinetic energy increase?

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.

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.