Practice Problems MCQ. Time Suggested: 6 minutes 1. A 10 newton force is applied to two masses 4 killograms and 1 kilogram respectivly so that they are in contact on the floor. The horizontal motion is along a frictionless plane. What is the magnitude of the contact force between the masses? Answer in Newtons: 2. The next two questions are based off the information below A 0.4 killogram mass is oscillating on a spring with a k values of 1000 N/m A. Which of the following would allow you to determine the maximum velocity of the system? A. No additional information needed B. Minimum Velocity C. Maximum Acceleration D. None of these B. Which of the following statements are correct? Maximum velocity and acceleration occur at the same time Maximum velocity occurs when the object is not accelerating Minimum acceleration occurs when the object is at rest None of these 3. A projectile is launched horizontaly with an initial velocity v0 from a height h. If it assumned that there is no air resistence, which of the following two expressions represent y as a function of time? h - 1/2gt^2 h - gv/2v0^2 h - gx^2/2v0^2 h - 1/2g(v0^2/x^2) FRQ. Time Suggested: 15 minutes Show your work to develop an expression for the coefficient of friction required so that a 1000 killogram car can drive around a 100 meter radius racetrack at 10 m/s without slipping down the incline.