The partical of mass 'm' is moving with the laws

[helpme1]

The particle of mass 'm' is moving with the laws ...

Homework Statement

The particle of mass 'm' is moving with the laws ...

Homework Equations

a. x=3t²+4 b. x=106t-t² c.x=1000t-5t² d.x=t²-20t e.x=50t-2t²
in what case the value of the force acting on the particle is the lowest ?

The Attempt at a Solution

i need your help. thanks in advance

 

[ApexOfDE]

what is relation between acceleration and position?

 

[helpme1]

sorry i don't know.

 

[helpme1]

no one could find the true answer?

 

[ApexOfDE]

if you don't know, read your tb again or check this: http://en.wikipedia.org/wiki/Acceleration

 

[pynergee]

Think about the relationship between position and velocity, and then the relationship between velocity and acceleration.

 

[helpme1]

i have no any opinion. i am not physicst, and i don't study it. but this semester i have to read it as a life knowledge subject. so, please help me to complete these tests. i need ur help urgently.