Thanks Berkeman, However, the only other information my teacher gave me was
The average power required to maintain the battery = M*V^2*fr = W
M= 176kg
V=13.8ms
Fr=energy usage fraction= 12%
Any ideas?
P789
Homework Statement
Electric motor in put power rating is 17.5kw
Voltage is 48V
Battery is 7.5kw/h
Average W needed to maintain motor per sec is 1446.7W
Homework Equations
Motor: W=I*V > I = 364.58Amps
The Attempt at a Solution
My attempt: If 1kw = 3.6 x10^6J > 7.5 * 3.6 x 10^6 =...
[b]1. I have two calculators. including the Texas inspire cx. I can't make either of them work reliably on trig questions. I have an exam sunday and i need to be sure how to use my inspire.
[b]2. Summation: [50][0.5] + [50][0.07cos35] + [100][0.1cos35] = 13.55
[b]3. Now i got this formula off my...
Right thanks Phan, My teacher answered me to say that
Anti clockwise forces are given a negative notation and
Clockwise forces a positive notation. Although you can swap those values around, i think it is a good bookeeping excercise - as opposing forces are negative.
which is where i went...
Homework Statement
A regular house door has 3 forces acting on it.At the moment the door is open by 35 deg. Let's say two children are pushing on a door and mum is on the other side pushing back
1/ at 0.05m is 50N acting directly perpendicular to the door
2/ at 0.07m is 50N acting at right...