Page 99 - eEISBN FINALIZE

-2
a ms

0 ms -1 v ms -1
F N
m kg

s m

From equation: = + 2
2
2
2
− 2
=
2
2
− 0
=
2
2
=
2

The average force required to move the body:

=

2
= ( )
2

Work done by force F N with displacement of s meter:

W = Fs

v 2
W = m( )s
2s
v 2
W = m( )
2
1
2
W = mv
2

Therefore:
kinetik energy = work done

kinetik energy (E ) = W
k

1
2
kinetik energy (E ) = mv
k
2

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