PHSI191 Lecture Notes - Lecture 1: Electromagnetism, Partial Pressure, Perfect Fluid

Newton's Law of gravitation is represented by

what is the SI unit of the proportionality constant G.

Calculate the force required to pull a copper ball of radius2.50 cmupward through a fluid at theconstant speed 9.00 cm/s. Take thedragforce to be proportional to the speed, withproportionalityconstant 0.950 kg/s. Ignore the buoyant force.

 According to Newton's second law of motion, when an object is acted upon by a net force, what can be said about its acceleration?

A. It is zero.

B. It is proportional to the mass of the object.

C. It is inversely proportional to the object's mass.

D. it is inversely proportional to the net force. 

E. It is independent of the mass.