Posted by **marie** on Saturday, January 21, 2012 at 9:10pm.

acceleration=force divide by mass . How do you solve 20m/s2 =unknown divide by 0.15kg

- 7th science -
**Henry**, Sunday, January 22, 2012 at 9:24pm
a = F/m,

Multiply both sides by m:

F = ma = 0.15 * 20 = 3 N.

OR

a = F/m,

20 = F/0.15,

Solve for F:

F = 0.15*20 = 3 N.

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