Acar is moving forward at 0.35 m/s. attached to the rear-view mirror is a small air freshener with a string that is 15 cm
long. if the car were to suddenly come to a complete stop. what would be the maximum angle the air freshener string
would rotate through from a starting position of directly down?

Explanation:

From the law of conservation of energy, the potential energy is converted to kinetic energy hence

where m is mass, g is acceleration due to gravity considered as 9.1m/s2, h is height and v is the velocity

and making h is the subject

Also, where L is the length of string given as 15 cmand is the angle of inclination

Therefore, is approximately

think its the third option