A 0.30-kg mass attached to the end of a string swings in a vertical circle (
R = 1.6 m), as shown. At an instant when
θ = 50
°, the tension in the string is 8.0 N. What is the magnitude of the resultant force on the mass at this instant?
◦ 5.6 N
◦ 6.0 N
◦ 6.5 N
◦ 5.1 N
◦ 2.2 N