22. In which of the following cases is no work done? a. A weightlifter lifts a barbell. b. A weightlifter holds a barbell overhead. d. A weightlifter walking with a barbell. C A weightlifter slowly lowers a barbell.
23.
l it is a transfer of energy and a product of force applied on an object and a displacement. a work b. power C. KE d. PE
24. Which of the following shows potential energy. a. twisted rubber band b. running man c. rolling toy d. girl walking down
25. Which of the following is a unit of work? a. kg b. meter C. second
26. What is the unit of measurement if you are looking for the acceleration of an object? a. 9.8 m/s2 b. kg/ms2 c. m/s2 d. N d. joule​