1. A 5-kg object moves around a circular track with a radius of 18 cm at a constant speed of 6 m/s. Find (a) The magnitude and direction of the acceleration of the object. (b) The net force acting upon the object causing this acceleration. 2. A cyclist is moving around a circular path with a radius of 50 m at a speed of 10 m/s. (a) Find the cyclist's acceleration. (b) Considering the combined mass of the cyclist and bicycle to be 120 kg, what is the net force applied to them? 3. A race car is traveling around a circular path with a radius of 400 m at a speed of 50 m/s. Find the centripetal acceleration of the car.