Question

a ? is a device used to measure the tension of the pull. (choose all that apply.)
a. dynamometer
b. footswitch
c. tension monitor

Explanation:

To determine the correct answers, we analyze each option:

• Option a (dynamometer): A dynamometer is specifically designed to measure force, including tension from a pull. This matches the requirement.
• Option b (footswitch): A footswitch is a device operated by foot, typically used to control electrical circuits, not for measuring tension. So it's incorrect.
• Option c (tension monitor): As the name suggests, a tension monitor is used to measure tension, including the tension of a pull. This is correct.

Answer:

a. dynamometer, c. tension monitor