1. A machine applies a force of 333N for 13.0 seconds to pull an object a distance of 25.0 m. The power required by the machine is ___ watts. 2. A bullet is fired into a ballistic cushion at 217 m/s. If the bullet has a mass of 5.14 g, and exits the 85.1 cm thick cushion with a velocity of 131 m/s, the magnitude of the force applied to the bullet by the cushion is __._ N. 3. A 0.647 mass is attached to a horizontal spring, and is oscillating along a frictionless surface. If the spring constant of the spring is 75.0 N/m, and the maximum displacement is 17.4 cm, the maximum speed of the mass as it passes through the equilibrium point is _.__ m/s. 4. The maximum of the restoring force for a pendulum Bob with a mass of 3.95 kg that has been pulled to an angle of 25.0 degrees from the vertical, on earths surface is __._ N. 5. A 5.07kg mass is attached to a vertical spring causing the spring to stretch by 13.2 cm. The spring constant of the spring is ___ N/m. 6. A 1.74 mass is attached to a vertical spring. If the spring goes down and returns to its original position 407 times in 6 minutes, the spring constant for the spring is __._ N/m. 7. A police car is coming towards to at 13.3 m/s with its 923 Hz siren on. The frequency you will hear if the speed of sound is 340m/s is ___ Hz