Asked by Hannah
What is the work required to raise a 10. kg object from the surface of the Earth to a height of 2.0 m?
5.0 J
20. J
2.0 E2 J
2.0 E3 J
My answer was 20. J but this was wrong. Is the answer 2.0 E2 J?
A net force of 9.0 N acts through a distance of 3.0 m in a time of 3.0 s. The work done is?
3.0 J
9.0 J
27 J
81 J
My answer was 9.0 J but again this was wrong. Is the answer 81 J?
5.0 J
20. J
2.0 E2 J
2.0 E3 J
My answer was 20. J but this was wrong. Is the answer 2.0 E2 J?
A net force of 9.0 N acts through a distance of 3.0 m in a time of 3.0 s. The work done is?
3.0 J
9.0 J
27 J
81 J
My answer was 9.0 J but again this was wrong. Is the answer 81 J?
Answers
Answered by
bobpursley
1) E=weight*h=10g*2=20g which is approx 196N so sthe best answer is 2.0E2 J
2) work=force*distance=9*3J
2) work=force*distance=9*3J
Answered by
José
2.0 E2 J
convert 10 kg to Newtons
10 kg = 98.0665 Newtons
W = F(d)
W = 98.0665 (2)
W = 196.133
W = 2.0 E2 J when rounded
27J
W = F (d)
W = 9.0N (3.0m)
W = 27J
Time doesn't matter here
convert 10 kg to Newtons
10 kg = 98.0665 Newtons
W = F(d)
W = 98.0665 (2)
W = 196.133
W = 2.0 E2 J when rounded
27J
W = F (d)
W = 9.0N (3.0m)
W = 27J
Time doesn't matter here
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