1. A 12,000 N force is applied to a horizontal spring which stretches it by 20.5 cm to the left. What is the spring constant of this spring? - 2. You are designing the spring shocks on a bicycle. The specifications are such that the shocks should not move more than 0.02 m when a person mounts the bicycle. The springs you are given have spring constants of 6700 N/m. What is the maximum MASS that can be put onto the bicycle? - 3. A spring is hanging vertically and has a spring constant of 320 N/m. An unknown mass is hung from the spring. a) If the mass causes the spring to stretch by 60 mm, find the weight and mass of the object. b) The same mass is placed on a vertical spring which has one end attached to floor. The spring is compressed by 32 cm. What is the spring constant of the spring? - 4. A cube rests on a seat of a car heading down the road at 10 m/s. The cube has a mass of 5 kg and each side of the cube is 20 cm long. What is the pressure of the box resting on the car seat