Objects with masses of 255 kg and a 555 kg are separated by 0.390 m.
(a) find the net gravitational force exerted by these objects on a 32.0-kg object placed midway between them.
(b) at what position (other than infinitely remote ones) can the 32.0-kg object be placed so as to experience a net force of zero?

Amachinist needs to remove a tight fitting pin of material a from a hole in a block made of material b. the machinist heats both the pin and the block to the same high temperature and removes the pin easily. what statement relates the coefficient of thermal expansion of material a to that of material b? a) the situation is not possible, heating block b will shrink the hole in the material as the material expands with increasing temperatureb) material b has the same coefficient of expansion as does material ac) material b has a negative coefficient of expansion and a has a positive coefficient of expansiond) material a has a greater coefficient of expansion than does material be) material b has a greate

What is work? how much work is done to move an object 0 meters?

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force