Consider figure E and answer questions 18 to question 23. The skier starts from rest at A at height of 100 m on a frictionless surface (H=uk=0). Eo=49 kJ A 100 m 60 m 30 m Figure E 18. The mass of the skier and the ski is? A) 49 kg B) 50 kg C) 60 kg D) 100 kg 19. The mechanical energy of the skier at B is? A) 49 kJ B) Less than 49 kJ C) More than 49 kJ D) Equal to U at B 20. The kinetic energy of the skier at C is? A) 1.5x10 J B) 49x10 J C) 5x10 J D) 47x10 J
Consider figure E and answer questions 18 to question 23. The skier starts from rest at A at height of 100 m on a frictionless surface (H=uk=0). Eo=49 kJ A 100 m 60 m 30 m Figure E 18. The mass of the skier and the ski is? A) 49 kg B) 50 kg C) 60 kg D) 100 kg 19. The mechanical energy of the skier at B is? A) 49 kJ B) Less than 49 kJ C) More than 49 kJ D) Equal to U at B 20. The kinetic energy of the skier at C is? A) 1.5x10 J B) 49x10 J C) 5x10 J D) 47x10 J
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Transcribed Image Text:Consider figure E and answer questions 18 to question 23.
The skier starts from rest at A at height of 100 m on a frictionless surface (us=uk=0). Eo=49 kJ
A
100 m
60 m
30 m
Figure E
18. The mass of the skier and the ski is?
A) 49 kg
B) 50 kg
C) 60 kg
D) 100 kg
19. The mechanical energy of the skier at B is?
A) 49 kJ
B) Less than 49 kJ
C) More than 49 kJ
D) Equal to U at B
20. The kinetic energy of the skier at Cis?
A) 1.5x10³ )
B) 49x10° J
C) 5x10° J
D) 47x10° J
21. The resultant force applied on the skier at E is?
A) ON
B) 50 N
C) 490 N
D) 498 N
22. The velocity v, of the skier at E is?
A) Om/s
B) 28 m/s
C) 2.8 m/s
D) 8 m/s
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