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84.
REASONING AND SOLUTION
a. The force acting on the sphere which accelerates it is the horizontal component
of the tension in the string.
Newton's second law for the horizontal motion of the sphere
gives
T
sin
θ
=
ma
The vertical component of the tension in the string supports the weight of the
sphere so
T
cos
=
mg
Eliminating
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This note was uploaded on 01/29/2010 for the course CALC 01:640:135 taught by Professor Soffer during the Spring '08 term at Rutgers.
 Spring '08
 SOFFER

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