Page 93 - eEISBN FINALIZE
P. 93
Example 1
i A body of mass 5 kg is pulled by a force of 2.5 N along a slippery floor. Calculate: Its
acceleration.
ii The velocity after 4.5 seconds.
iii The distance traveled in 4.5 seconds.
iv The work done by these forces.
Solution:
a
M kg F
= 5 , = 2.5
i. =
=
2.5
=
5
= . −2
ii. = 0, = 4.5 , = 0.5 −2
= +
= 0 + 0.5(4.5)
= . −1
iii. = 0, = 4.5 , = 0.5 −2 , = 2.25 −1
1
= ( + )
2
1
= (0 + 2.25)5
2
= .
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