## bladde_89 2 years ago Sorry to ask a stupid question but in the second lecture (Kinematics) there was this equation (x = 8 - 6t + t2) and i never studied this before, could some one explain how to solve this, Thank you

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1. Sourav16

x is the displacement. it is given as a function of time 't'. now velocity v=dx/dt differentiate the given function w.r.t time, you will get the velocity. if you need to find acceleration, differentiate it again.

2. seijurohiko

Do you know derive? If not tell me I teach you the simpliest way.

3. sk8rgirl12

It's not stupid. You don't know unless you ask or try. One of the 2. Either experience it, or learn from someone who has. That is my best advice.

4. fantastic001

we have displacement as function of time \[x = 8 - 6t + t^2 \] and when you differentiate it, you get \[frac{dx}{dt} = -6 + 2t = v \] and when you differentiate it again you get \[frac{dv}{dt} = 2 = a \] a is acceleration and v is velocity, here you have simple derivatives like \[frac{d(x^2)}{dx} = 2x \] etc...

5. fantastic001

sorry for my math formula bad writing, i am not familiar with this syntax (this is not latex ?) :) frac is just a fraction