What is the work required to raise a 10. kg object from the surface of the Earth to a height of 2.0 m?

Question

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?

Answer 1

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

Answer 2

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