The position of an object is given by x = at^3-bt^2+ct, where a = 4.1 m/s^3, b = 2.2 m/s^2, c = 1.7 m/s, and x and t are in Si units. What is the instantaneous acceleration of the object when t = 0.7 s?

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?