Bob is pulling a 30kg filing cabinet with a force of 200n , but the filing cabinet refuses to move. the coefficient of static friction between the filing cabinet and the floor is 0.80.part awhat is the magnitude of the friction force on the filing cabinet? express your answer to two significant figures and include the appropriate units. f =

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

Why does the input force have to be greater than the force needed to lift the bale?

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx