What two factors do you need to know to calculate how much work was done in any situation? fast due in 25 min

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Alarge box of mass m is pulled across a horizontal frictionless surface by a horizontal rope with tension t. a small box of mass m sits on top of the large box. the coefficients of static and

An electron in an x-ray machine is accelerated through a potential difference of 1.00 × 104 v before it hits the target. what is the kinetic energy of the electron in electron volts?