How Do You Calculate Acceleration at t = 1/1.1 sec from the Given Equation R(t)?

[mike32]

Homework Statement

All numerical constants are in the appropriate units, so that R (t) in units of meters, and a = 3.1 sec-1.

What is acceleration size (in meters per second ^ 2) t = 1 / 1.1 sec?

Note: When calculating sin (at), make sure the computer is in radian mode.

Homework Equations

R(t)= 8.4sin(at) +(3.1e^(-7t)) +6.9t^3

The Attempt at a Solution

Couldn't get to a solution

 

[Nidum]

Please try to explain this problem more clearly . Post the complete original wording of the problem as given to you if possible

 

[mike32]

R (t) in meters and a= 3.1 sec^-1

What is its acceleration (m/s^2) in t = 1 / 1.1 seconds?

 

[haruspex]

What is its acceleration

How do you go from an expression for position to one for acceleration?

t = 1 / 1.1 seconds?

Do you mean literally $\frac {1}{1.1}$ seconds? That is a very odd way to specify the time.

 

[mike32]

ok. but this is data in question.

 

[haruspex]

ok. but this is data in question.

Ok, so answer my first question.

 

[mike32]

Have to cut twice the equation and put t