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mechanics
A stone is thrown upwards from the top of a cliff.After reaching its maximum height,it falls past the cliff-top and into the sea.
The graph shows how the vertical velocity v of the stone varies with time t after being thrown upwards.R and S are the magnitudes of the areas of the two triangles.
What is the height of the cliff-top above the sea?
The graph shows how the vertical velocity v of the stone varies with time t after being thrown upwards.R and S are the magnitudes of the areas of the two triangles.
What is the height of the cliff-top above the sea?
R - S
the area under a velocity time graph gives displacement. The point where v = 0 is where the stone reaches its maximum height. the area before this is the distance travelled before this. The area after is the distance travelled after. the difference is therefore the hight of the cliff above the sea.
the area under a velocity time graph gives displacement. The point where v = 0 is where the stone reaches its maximum height. the area before this is the distance travelled before this. The area after is the distance travelled after. the difference is therefore the hight of the cliff above the sea.
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