Given wooden materials and joints, I'm assigned to build trusses that is able to support the maximum load with least weight of the structure. What are the factors that contribute to the support of the structure ?
Homework Statement
Find the range of values of m for which the function 3x^2 -12x + m is negative for all values of x.
Homework Equations
Is it possible for the function to be negative ? If so, how ?
The Attempt at a Solution
I tried using b^2 - 4ac < 0 and the result is m > 12 ...
When moving the lawn mower, it is of course easier to pull it. But in cutting the grass, is it easier to push it ? Assuming that the total force acting on the grass is higher and therefore, the job will be easier ?
Here is the question that I don't understand :
When cutting grass with a lawn mower, a worker can either push or pull it. Using physics concepts, compare the difficulty of the job when the worker pushes the lawn mower or pulls the lawn mower
Pushing or pulling will be easier to do the work...