Jillian is using a wrench to tighten a bolt The lever arm re

Jillian is using a wrench to tighten a bolt. The lever arm representing the position and length of the wrench is given by the r = (2, 1, 4). The force she is exerting is given by the F = (5, 2, 10). Determine how much torque she is exerting and find the angle between the line of the force and the line of the lever arm.

Solution

cosAngle=r.F/|r||F|=52/52.048 A=2.46 degrees torque=rFsinA=2.234 Nm