## Calculating loads in a truss

There are plenty of resources on the web for reading about how to calculate stresses in a system of trusses. West Point has an activity I'd like to try in a physics class. Below is an example I have started … Continue reading

## HHG p159 num23

The graph of the function is below. Which of the follow four numbers could be an estimate of ? (a) -98.35 (b) 71.84 (c) 100.12 (d) 93.47 Solution: Area is not negative, since graph is above the -axis. It completely … Continue reading

## HHG p159 num22

Suppose that we use subintervals to approximate . Without computing the Riemann sums, find the difference between the right-and left-hand Riemann sums. Solution: If the intervals are assumed to be the same width, then the last 499 terms of the … Continue reading

## HHG p159 num21

Without computing the integral, decide if is positive or negative, and explain your decision. Solution: We know that (in blue) is positive but decreasing. On the other hand, (in green) is positive on , and then repeats itself (but negative) … Continue reading