How Accurate Are These Calculations Based on Newton's Second Law?

[salooom599]

Homework Statement

http://img104.herosh.com/2011/05/20/237027318.jpg

Homework Equations

F=ma

The Attempt at a Solution

i got 8.66x10^-17 and 3.9x10^-67

Please i need help.

 

[Doc Al]

Please show your work. How did you calculate the acceleration?

 

[salooom599]

V(final)= Displacemenet/Time << to get the time
then
Acceleration= V(final)/Time

but am not sure ...

 

[Doc Al]

V(final)= Displacemenet/Time << to get the time

To get the time you'll need the average velocity, not the final velocity.

then
Acceleration= V(final)/Time

Acceleration = ΔV/Time.