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DYNAMICS OF RIGID BODIESLESSON 2

KINETICS OF A PARTICLE: FORCEAND ACCELERATION

Prepared by:

Engr. Michael M. Salvahan

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Kinetics

  Kinetics is a branch of dynamics that deals

with the relationship between the change in

motion of a body and the forces that cause

this change.  The basis is Newtons !nd "aw of Motion.

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Mass and Weight

  Mass is a properly of matter that provides a

#uantitative measure of its resistance to a

change in velocity. $t is an absolute #uantity

and so it does not change from one locationto another.

  Weight  is a force that is caused by the

earth%s gravitation. $t is not absolute& ratherit depends on the altitude of the mass from

the earth%s surface.

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Sample P!"lems:'. The ()*+g crate shown in the figure below

rests on a hori,ontal surface for which thecoefficient of +inetic friction is -+ )./. $f the

crate is sub0ected to a 1))*N towing force as

shown& determine the velocity of the crate in /s starting from rest.

 Answer:

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Sample P!"lems:!. The ()*+g crate shown in the figure below

rests on a hori,ontal surface for which thecoefficient of +inetic friction is -+ )./. $f the

crate is sub0ected to a 1))*N towing force as

shown& determine the velocity of the crate in /s starting from rest.

 Answer:

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Sample P!"lems:/. The ()*+g crate shown in the figure below

rests on a hori,ontal surface for which thecoefficient of +inetic friction is -+ )./. $f the

crate is sub0ected to a 1))*N towing force as

shown& determine the velocity of the crate in /s starting from rest.

 Answer:

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Sample P!"lems:/. The ()*+g crate shown in the figure below

rests on a hori,ontal surface for which thecoefficient of +inetic friction is -+ )./. $f the

crate is sub0ected to a 1))*N towing force as

shown& determine the velocity of the crate in /s starting from rest.

 Answer: