Aflați lucrul mecanic L efectuat de forța de tracțiune pentru a mări viteza unui corp de masă m = 2 kg, de la v1=1 m/s la v2=5 m/s, mișcarea având loc fără frecare.

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.