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1. The problem statement, all variables and given/known data

A particle of mass 2kg moves under the action of forces 3i- 12j, andi+ 6j.

(i) Find the resultant force acting on the particle in the form ai+ bj

(ii) Find the acceleration of the particle

2. Relevant equations

F = ma

3. The attempt at a solution

(i)

R = 3i+i- 12j+ 6j

R = 4i- 6j

(ii)

Using F = ma

4i- 6j= 2a

2i- 3j= a

asquared = 2squared + (-3)squared

a = square root of (4 + 9)

a = square root of 13

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# Homework Help: I & j Vector Question

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