What force acts on all objects, What force acts on all objects, all the time on earth? State this force, and write the notation used for this force. What force does a surface exert on an object perpendicularly? State this force , and write the notation used for this force.

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius