Problem 14:   Attached to the rear-view mirror of a car is a small crystal of mass 50 g on a string. When the car is stopped at a light, the crystal hangs vertically. When the light turns green, the driver accelerates and notices the crystal makes an angle of θ = 14 degrees with respect to the vertical. Part (c)  What is the car's acceleration in m/s2?  Part (d)  When the car is no longer accelerating, what is the new angle, θ2 in degrees?