Jack and jill are maneuvering a 3400 kg boat near a dock. initially the boat's position is $\langle 3, 0, 4 \rangle$ m and its speed is 1.8 m/s. as the boat moves to position $\langle 4.5, 0, 5 \rangle$ m, jack exerts a force $\langle -340, 0, 300 \rangle$ n and jill exerts a force $\langle 130, 0, 320 \rangle$ n. how much work does jack do?

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?