A toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed using 1000 J of work, is
A) 20 W.
B) 50 W.
C) 100 W.
D) 1000 W.
E) 20,000 W.
Correct Answer:
Verified
Q1: One kilowatt-hour represents
A)1 N.
B)60 N/s.
C)60,000 W.
D)3.6 million
Q2: Which task requires more work?
A)lifting the 50-kg
Q4: The work done in pushing a TV
Q5: The work you do when pushing a
Q6: The power required to exert 4-N force
Q7: Both a 50-kg sack is lifted 2
Q8: The work you do when pushing a
Q9: The work you do when pushing a
Q10: If you do work on a skateboard
Q11: When a drawn bow of potential energy
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