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The rectilinear motion of a particle is given by s=v^2 - 9, where s is the displacement and v is the velocity When time t=0, s=0 and v=3m/s. Determine the s-t relation of motion
Ans) s=3t+0.25t^2?
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The rectilinear motion of a particle is given by s=v^2 - 9, where s is...
Given:
s = v^2 - 9,
s = 0, v = 3m/s at t = 0

Required:
s-t relation of motion

Solution:
We know that acceleration is the derivative of velocity and velocity is the derivative of displacement. Hence, we can find the acceleration by differentiating the given equation with respect to time.

a = dv/dt = 2v(dv/ds)

We can substitute s = v^2 - 9 in the above equation to get:

a = 2v(dv/ds) = 2v(2v/2) = 2v^2

We know that acceleration is constant in this case as it is not a function of time. Hence, we can use the basic kinematic equation:

s = ut + 1/2 at^2

where u is the initial velocity and a is the constant acceleration.

Substituting the values, we get:

s = 3t + 1/2 * 2v^2 * t^2
s = 3t + v^2t^2

Substituting the given values, we get:

s = 3t + 0.25t^2

Hence, the s-t relation of motion is s=3t 0.25t^2.

Conclusion:
The rectilinear motion of a particle is given by s=v^2 - 9. The s-t relation of motion is s=3t 0.25t^2.
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The rectilinear motion of a particle is given by s=v^2 - 9, where s is the displacement and v is the velocity When time t=0, s=0 and v=3m/s. Determine the s-t relation of motionAns) s=3t+0.25t^2?
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