Unit: WORK & ENERGY
Year: 1993 Question#: 25
Question: Base your answers to questions 24 through 26 on the diagram below which represents a frictionless track. A 10-kilogram block starts from rest at point A and slides along the track.
25. WHAT IS THE APPROXIMATE SPEED OF THE BLOCK AT POINT B?
(1 ) 1 m/s
(2 ) 10 m/s
(3 ) 50 m/s
(4 ) 100 m/s
What is this question really asking?
Explanation by: DIANA L.
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Answer 1
1 m/s
INCORRECT
MISTAKE IN CALCULATIONS. TRY AGAIN! Don't forget conservation of energy. return to top
Answer 2
10 m/s
CORRECT
EA = 
EBGPEA = KEB mgh=1/2 mv2 gh=1/2 v2 (10 m/s2)(5.0 m)= 1/2V2 100 m2/s2 = v2 10 m/s = v return to top
Answer 3
50 m/s
INCORRECT
MISTAKE IN CALCULATIONS. TRY AGAIN! return to top
Answer 4
100 M/S
INCORRECT
MISTAKE IN CALCULATIONS. TRY AGAIN! Looks like you forgot to take the square root. return to top
What's this question really asking?
WHAT IS THE VELOCITY AT POINT B? (CONSERVATION OF ENERGY) return to top
