Finding Velocity and Acceleration in Simple Harmonic Motion

[vooov92]

Please help me,

Question
The equation of motion of a mass is given as x = (0.2m) sin (3t). Find the velocity and acceleration of the mass when the object is +5cm from its equilibrium position.

 

[Doc Al]

Given position, how do you find velocity and acceleration? (What are the definitions of velocity and acceleration?)

Hint: Use a bit of calculus.

 

[vooov92]

how??
for v i use dx/dt
for a i use dv/dt

so how to solve it, i also not understand the statement... anyone can help me

 

[Doc Al]

how??
for v i use dx/dt
for a i use dv/dt

Exactly. So find expressions for v and a. Then combine them with the expression for x.

 

[vooov92]

Exactly. So find expressions for v and a. Then combine them with the expression for x.

can u show me the work step... can?

 

[Redbelly98]

You were given an expression for x, so find dx/dt for that expression.

 

[vooov92]

You were given an expression for x, so find dx/dt for that expression.

tq very much...