Physics Review Question

Unit: Energy
Year: 1989 Question#: 2
Question: Base your answers to questions 2 through 4 on the information and the diagram below. The diagram represents a block sliding along a frictionless surface between points A and G.

As the block moves from point A to point B, the speed of the block will be

(1 ) decreasing
(2 ) increasing
(3 ) constant
(4 ) zero

What is this question really asking?


Explanation by: Anna R


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Answer 1
decreasing

INCORRECT

When the block starts at point A the surface is flat and so the speed is constant, but when it goes down to point B, the slope is down and gravity pulls the block, accelerating it.
return to top























Answer 2
increasing

CORRECT

When the block starts at point A the surface is flat and so the speed is constant, but when it goes down to point B, the slope is down and gravity pulls the block, accelerating it. return to top



























Answer 3
constant, but not zero

INCORRECT

When the block starts at point A the surface is flat and so the speed is constant, but when it goes down to point B, the slope is down and gravity pulls the block, accelerating it. return to top


























Answer 4
zero

INCORRECT

When the block starts at point A the surface is flat and so the speed is constant, but when it goes down to point B, the slope is down and gravity pulls the block, accelerating it. return to top


























What's this question really asking?

What happens to the speed of an object as it goes down hill? return to top

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