1) какие физические величины всегда положительны : а)мощность
б)работа
в)кинетическая энергия
г)полная энергия?
2)под действием силы 20 ньютон тело перемещается на 4 см . определить работу этой силы в джоулях.
ответы с решениями срочнооо

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

Aracecar driver has to hold on tightly when going around a banked curve. approximately what is the centripetal force on a 2220.0 kg car going around a circle with a diameter of 190.0 meters at 25.0 m/s?