Unit: Waves
Year: 1992 Question#: 45
Question: In the accompanying diagram, a 1.0 kilogram sphere at point A has a potential energy of 5.0 joules. What is the potential energy of the sphere at point B, halfway down the incline?
(1 ) 0.0 joules
(2 ) 2.5 joules
(3 ) 3.0 joules
(4 ) 6.0 joules
What is this question really asking?
Explanation by: Ray
[ Return to question menu ]
Answer 1
0.0 joules
INCORRECT
This is incorrect, because halfway down the slope, is 1/2 the height, therefore, halfway down, GPE= to (1/2)hmg. 0.0 is not equal to 1/2 of 5. return to top
Answer 2
2.5 joules
CORRECT
This answer is correct, because 2.5 is equal to 1/2 of 5, which is 1/2 of the height. return to top
Answer 3
3.0 joules
INCORRECT
This is incorrect, because halfway down the slope, is 1/2 the height, therefore, halfway down, GPE= to 1/2hmg. 3.0 is not equal to 1/2 of 5. return to top
Answer 4
6.0 joules
INCORRECT
This is incorrect, because halfway down the slope, is 1/2 the height, therefore, halfway down, GPE= to 1/2hmg. 6.0 is not equal to 1/2 of 5. return to top
What's this question really asking?
Does the GPE halfway down equal half of the initial potential energy? return to top
