Question

four machines (A-D) push four identical heavy boxes 100 m along a track. According to the graph, which machine pushed with the greatest force?

Machine A, machine B, machine C, machine D, or all pushed with the same force?

Answer 1

we have this general relationship, between power P, force F and velocity v:

\[\Large P = {\mathbf{F}} \cdot {\mathbf{v}}\]

Answer 2

ok!

Answer 3

that is a vector equation. Now if velocity and Force have the same orientation and direction, we can write:
\[\Large P = Fv\]

Answer 4

yes!

Answer 5

that equation, in the plane P-v represents a line whose slope is the force F

Answer 6

so mahcine A is the solution here?

Answer 7

that's right!

Answer 8

yay~ thanks!!

Answer 9

:)