
Arbejde og energi
Quiz
•
Physics
•
12th Grade
•
Practice Problem
•
Hard
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6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Hvor meget potentiel energi får en bog på 1 kg, når den løftes 2m op ?
19,64 kJ
18,64 J
19,64 J
1,964 J
2.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Hvor stor er tilvæksten i potentiel energi , når et 100g -lod løftes 1m op ?
9,82 m
0,982 J
9,82 s
9,82 W
3.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
En kanonkugle med massen 10 kg skydes af sted med 100 m/s. Udregn kuglens kinetiske energi, når den forlader kanonen.
50 MJ
50 kJ
50 J
50 mJ
4.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
En tennisbold med massen 70 g slippes fra højden 2,5 m. Hvor stor er boldens kinetiske energi, umiddelbart inden den rammer jorden ?
17,185 J
1,7185 J
171,85 J
5.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
En bil bremser fra hastigheden 10 m/s til hvile med en bremselængde på 20 m. Bilens masse er 1200 kg. Hvor stort et arbejde har bremsekraften udrettet ? Arbejdet er lig med ændringen i kinetisk energi.
20 kJ
30 kJ
60 kJ
30 MJ
6.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Kurts masse er 100 kg. Han løber op ad en trappe, som er 3m høj. Hvor stort et arbejde udfører Kurt ? Længden af trappen er 6 m.
2946 J
2946 W
5892 J
5892 W
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