Martha must carry a 45 n package up three flights of stairs. each flight of stairs has a height of 2.3m, and the actual distance of a diagonal path she walks up the stairs is 10 m. what is the total work done on the package?

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u. s. legal proceeding.)

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?