Suppose that you want to move a heavy box with mass 30.0 across a carpeted floor. you try pushing hard on one of the edges, but the box does not move. suppose that you are pushing against the box from an angle 30.0 above horizontal with a force of magnitude 240 . what is the magnitude of the friction force acting on the box?

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?

Who was the first scientist to measure speed as distance over time?

What effects result when there is an impact between earth and an asteroid? check all that apply. a.massive flooding. b.extinction of many life forms.c.major earthquakes change in average global temperature.d. giant dust cloud