Mahajir Indain
New member
You are holding a briefcase by the handle, with your arm straight down by your side.
Does the force your hand exerts do work on the briefcase when;
(a) You walk at a constant speed down a horizontal hallway and
(b) You ride an escalator from the first to second floor of a building? In each case justify
your answer
Does the force your hand exerts do work on the briefcase when;
(a) You walk at a constant speed down a horizontal hallway and
(b) You ride an escalator from the first to second floor of a building? In each case justify
your answer