Q. Water waves in a shallow dish are 10 cm long. At one point, the water oscillates up and down at a rate of 5.70 oscillations per second. What is the speed of water wave? What is the period of the water waves?
Q. A 2000kg vehicle is travelling down the road at 20m/s (45 mph) when it reaches an intersection. Between rubber and dry asphalt, the coefficient of friction is 0.80. What is the minimum distance necessary for the car to stop?