What force must you exert on a ball point pen in order to apply a pressure of0.067 N/mm2on a piece of paper, if the ball of the pen has a surface area of1.2 mm2touching the paper?

The force that must be exerted on the pen is 0.0804 N.

Explanation:

Given;

pressure applied on a piece of paper by ball point of the pen, P = 0.067 N/mm²

surface area of the pen ball point, A = 1.2 mm²

The force that must be exerted on the pen is calculated as;

F = P x A

F = (0.067 N/mm²) x (1.2 mm²)

F = 0.0804 N

Therefore, the force that must be exerted on the pen is 0.0804 N.

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

the force on the thing and the distance the force moves the thing