Recent content by Jtwa

Thank you for the response. The missing equation is P=IV which helps us calculate the Wind Power I've calculated the following: TV Power = 100W Light Power = 100W Wind Power = 1000W Since a watt is a J/s then the TV and Light require 2.4x106 J Divide power required by wind power and we get...

Homework Statement In a household, the wife reads a book that uses a light bulb that has a resistance of 100Ω and is connected to a 100 V line while the husband watches a TV that draws 100 W of power. They do these actives for 200 mins. Power comes from a wind generator that charges batteries...

Homework Statement During the game, the metabolism of basketball players often increases by as much as 30.0 W. How much perspiration must a player vaporize per hour to dissipate this extra thermal energy? Assume that perspiration is simply pure water and that perspiration starts at temperature...

If you're driving in a car and map out all the displacement vectors, you can add the segments to get the total displacement. Correct? Why can't we add the various velocity vectors for the different segments to get the average velocity. ? Could you add up all the velocity vectors and divide by...

I'm still having trouble understanding this question. Can someone draw a FBD ? Is Normal Force suppose to be on the FBD?

Since the rope is connected to the man, why isn't T=(mass of man)*g

Homework Statement A professor (m= 75 kg )is seated on a light harness connected to a rope and pulley system. The professor's feet touch a uniform plank (mplank = 15kg) which is supported by a hinge at the wall. A bucket (M) is suspended from the right end of the plank. m = 75kg mplank = 15kg...

oops. I forgot to upload a photo

1. Homework Statement h = 17.2 cm A = 12.32cm2 E = 410 MPA Fapp = 6130 N 2. Homework Equations Stress σ = F/A where F is force applied and A is cross sectional area of side where force is applied Strain ε = ΔL/L where L is the length of the bar and ΔL is the change of length of bar Young's...