Question

Lab #13: Work and Angular Momentum Wear running shoes/sneakers to this lab Prelab questions (to be answered on a separate sheet of paper and handed in): 1.) What are the formulas and definitions for work and power? 2.) If the same engine (with constant power) tries to move a 100 kg mass and a 200 kg mass uphill, which one would take more time? 3.) If the same engine (with constant power) tries to move a 100 kg mass and a 200 kg mass uphill, which one would do more work? 4.) Explain what angular momentum is in your own words. DESPITE YEARS OF STUDYING PHYSICS I STILL FIND GREETINGS. GYROSCOPES A LITTLE FREAKY HuMRN From XKCD comics: htt

Answer 1

while climbing up a hill (smooth ) of some angle i

force = mg sini

Work = F*d = mgsini *d

Power = Work/time = mgsini*d/t

b) let us say that power = P W

to carry a mass work done = mg*sini*l

(so more is the mass, more is the work required to be done)

and the power is constant

so, 200kg requires takes more amount of time than 100kg

c) similarly 200kg requres more amount of work

d) Angular momentum = m*v*r

it is the magnitude of rotation of a body, which is the product of its moment of inertia and its angular velocity.