A Negative Potential Energy May Be Made Positive by Changing

Q34: If you lift a 15-N weight vertically

Q35: A force of 12 N acts on

Q36: Which of the following four objects has

Q37: With a constant braking force, the stopping

Q38: In pushing an object on a level

Q40: A kilowatt-hour is a unit that measures<br>A)

Q41: The SI unit of power is the

Q42: Work is defined as force times<br>A) distance.<br>B)

Q43: In lifting an object, work is done

Q44: A system may<br>A) be isolated.<br>B) have real