� 𝐹
⃗
∝ 𝑚
⃗

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Customized by Dr. Ahmad I. Ayesh, Department of Mathematics, Statistics and Physics , Qatar University, 2014
Mass and Acceleration
•
The acceleration of an object
is inversely proportional to
the object’s mass if the net
force remains fixed.
𝑚 ∝
1
𝑚

Customized by Dr. Ahmad I. Ayesh, Department of Mathematics, Statistics and Physics , Qatar University, 2014
Newton’s second law of motion
The acceleration of an object is directly proportional to the net force acting on it, and
inversely proportional to the mass of the object.
� 𝐹
⃗
=
𝑚𝑚
⃗
The
SI unit
for force is the newton (N).
1𝑁
=
1𝑘𝑚
.
𝑚
𝑖
2
The component form:
� 𝐹
𝑥
=
𝑚𝑚
𝑥
,
� 𝐹
𝑦
=
𝑚𝑚
𝑦
,
� 𝐹
𝑧
=
𝑚𝑚
𝑧

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Customized by Dr. Ahmad I. Ayesh, Department of Mathematics, Statistics and Physics , Qatar University, 2014
Some notes on units
1
𝑚𝑑𝑚𝑇
= 1
𝑚
.
𝑑𝑚
𝑖
2
= 10
−5
𝑁
•
We will use the
SI system
.