Avertical solid steel post of diameter d = 26cmand length l = 2.40m is required to support a load of mass m = 7800kg . you can ignore the weight of the post. take free fall acceleration to be g=9.8m/s2.part awhat is the stress in the post? express your answer using two significant figures. part bwhat is the strain in the post? express your answer using two significant figures. part cwhat is the change in the post's length when the load is applied? express your answer using two significant figures.

Need in all of themmm only answer if you know plsssss

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

Idon’t quite understand this problem