Help Please Guys

[hayz]

hey guys im having trouble working out this question. be great if ya can help.

 

The position of a golfball is given by r = ((3t^2)i^ + (2t^2-1/6gt^3)J^)m. Calculate its velocity and its acceleration at time t = 1s (assume that g = 10ms^-2

 

i^ = i hat

J^ = j hat

[Severian]

Do you know the definition of velocity and acceleration?

[s pepperchin]

You should explain to us how you are trying to do it.

[5614]

And do you know you can use calculus (differentiation and integration) to change formulae for either position, speed/velocity or acceleration into each other?

 

For example differentiating the equation for position (actually distance travelled from a point) will give you it's velocity.