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m=108kg

Initial Velocity= 4.6m/s

Length of ramp=755m

Incline=downwards at 19.6 degrees

I keep telling myself i'm not unintelligent.... But this keeps replying otherwise :yuck:

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- Thread starter Tycho
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- #1

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m=108kg

Initial Velocity= 4.6m/s

Length of ramp=755m

Incline=downwards at 19.6 degrees

I keep telling myself i'm not unintelligent.... But this keeps replying otherwise :yuck:

- #2

cepheid

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- #3

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This should be in the Highschool Help section, but here is how I would do it:Tycho said:

m=108kg

Initial Velocity= 4.6m/s

Length of ramp=755m

Incline=downwards at 19.6 degrees

I keep telling myself i'm not unintelligent.... But this keeps replying otherwise :yuck:

Given: mass, v

There is a kenematics equation: v^2 = v

The only thing you do not know is the acceleration, which you can find from the given quantities. The only thing acting on your object is Gravity.

- #4

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PrudensOptimus said:This should be in the Highschool Help section, but here is how I would do it:

Given: mass, v_{0}, dx, and angle theta, we want to find v.

There is a kenematics equation: v^2 = v_{0}^2 + 2*a*dx

The only thing you do not know is the acceleration, which you can find from the given quantities. The only thing acting on your object is Gravity.

dx? is that the length of the incline?

and to find the acceleration, is that a=-g*SIN(angle)?

- #5

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dx is the length of the line in this case.Tycho said:dx? is that the length of the incline?

and to find the acceleration, is that a=-g*SIN(angle)?

Acceleration is defined to be a = Sum of all forces / m for constant mass objects.

your a = -g*SIN(angle) is misleading. It will not work in all cases.

- #6

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Final velocity should be 70.6 m/s down the slope.

- #7

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distance, s = 755

initial velocity, v' = 4.6

substitute values in

V^2 = (V')^2 + 2as

v=71 m/s (aprox)

- #8

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just in case you might ask why is the final velocity almost 15 times faster than the initial speed: The distance played a major factor in determining this such increase... as you go further, your speed increases.PrudensOptimus said:Final velocity should be 70.6 m/s down the slope.

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Tide

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