Question

A muscle builder holds the ends of a masslessrope. At the

center of the rope, a 15kg ball is hung. What is the tension in the
rope if the angle is4.5degrees?

Answer 1

Balancing of forces,

In the X-direction:

-Tcos4.5^o +Tcos4.5^o=0

In the Y-direction:

Tsin4.5^o +Tsin4.5^o-m*g=0

2Tsin4.5^o=15*9.81

T=(15*9.81)/(2sin4.5^o)

=937.75 N

Therefore, tension in the rope is 937.75 N.