A block accelerated from rest by force along smooth incline for 5m until it clears the top of the ramp at speed 8m/s.
How can I find the highet elevation (h) above the x-axis for the block by by using this formula: V2=U2+2as?
2007-08-18 18:07:58 · 5 answers · asked by Ham J 2 in Science & Mathematics ➔ Physics
Just by this formula you can not get that.
we need more information such as the angle of the incline of the ramp or the height of the ramp.
At the end of the ramp:
Calculate the horizontal velocity and vertical velocity.
Calculate the potential energy
Calculate the total energy.
At the highest point in flight.
The horizontal velocity will be same. Get the Kinetic energy.
Calculate the new potential energy for h+x.
Calcualte total energy.
Equalize the first energy and second energy calculation.You will get X(which is the incremental height from the end of the ramp.
For calculation assume mass=1.
After that calculate the height(attained) using the conservation of energy law.
Note: At the highest point will have just the horizontal velocity.
2007-08-18 18:46:24 · answer #1 · answered by Tangent 2 · 0⤊ 1⤋
V2=8m/s
U2=0
a=-9.8
s=5m
However this problem does not take into account the horizontal and vertical components of the velocity due to the slope of the ramp.
And of course the block will continue along the slope line after it clears the end until gravity slow it to 0
So in actual fact the highest elevation will be a smidgeon more than 5M times the sine of the slope of the ramp.
2007-08-19 01:28:36 · answer #2 · answered by Anonymous · 0⤊ 1⤋
Well v=1/2at^2 so that means 8=1/2at^2
You don't know what time it took to accelerate the block.
You don't know what the block weighs so you can't try
another formula. The formula you have requires S, a distance
and a, an acceleration, a velocity and U - but what is U?
If v^2=2as then v^2=2a8 or sqr(16a) or 4sqr(a)
2007-08-19 01:29:47 · answer #3 · answered by Hastyface 2 · 0⤊ 1⤋
The data is insufficient. We can calculate the velocity of the block as it clears the ramp by using the formula given. But unless we know the angle of incline we cannot calculate how high it would go. If we know it then same formula can be used to find the answer as 's' while taking v multiplied by cosine of the angle as u and final velocity as zero '-g' as 'a'.
2007-08-19 01:53:23 · answer #4 · answered by Let'slearntothink 7 · 0⤊ 1⤋
e=mc sq push the button and your question doent matter anymore.
2007-08-19 01:18:52 · answer #5 · answered by Anonymous · 0⤊ 2⤋