Talambuhay Ni Jose P Laurel - 2316 Words

1. If you push for an hour against a stationary wall, you do no work A) on the wall. B) at all. C) both of these D) none of these 1. If you push an object twice as far while applying the same force you do E) twice as much work. F) four times as much work. G) the same amount of work. 2. If you push an object just as far while applying twice the force you do H) twice as much work. I) four times as much work. J) the same amount of work. 3. If you push an object with twice the work input for twice the time, your power input is K) twice. L) four times as much. M) the same amount as for half the work in half†¦show more content†¦B) half as much. C) the same. 19. A TV set is pushed a distance of 2 m with a force of 20 N that is in the same direction as the set moves. How much work is done on the set? ) 2 J B) 10 J C) 20 J D) 40 J E) 80 J 20. It takes 40 J to push a large box 4 m across a floor. Assuming the push is in the same direction as the move, what is the magnitude of the force on the box? ) 4 N ) 10 N ) 40 N ) 160 N ) none of these 21. A 2-kg mass is held 4 m above the ground. What is the approximate potential energy of the mass with respect to the ground? ) 20 J ) 40 J ) 60 J ) 80 J ) none of these. 22. A 2-kg mass has 40 J of potential energy with respect to the ground. Approximately how far is it located above the ground? ) 1 m ) 2 m ) 3 m ) 4 m ) none of these 23. A heavy pile driver starting from rest falls on a pile with a force that depends on ) the original height of the driver. ) the original potential energy of the driver. ) the distance the pile is moved. ) all of these. ) none of these. 24. Using 1000 J of work, a toy elevator is raised from the ground floor to the second floor in 20 seconds. How much power does the elevator use? ) 20 W B) 50 W C) 100 W D) 1000 W E) 20,000 W 25. One end of a long,