Answer to Question #324209 in Mechanics | Relativity for aries183

Question

A person swings a 350 g ball around their head on a string as shown in the figure above.

The tension in the string is 10 N and the ball moves in a circle of radius 0.93 m at a constant speed of 5.0 m s−1.

What is the angle θ that the string makes with the horizontal? (in ° to 2 s.f)

Answer 1

$F=\frac{mv^2}r=9.4~N,$

$\alpha=\arccos \frac FT=20°.$