QUIZ 1. What is the SI unit for momentum? a. Kilogram meters per second b. Kilogram meters per second squared c. Meters per kilogram per second squared d. Kilograms per second squared Answer: b. There is no easy SI unit for momentum. Instead, it is listed in the known SI units for mass and velocity, which are kilogram meters per second. It depends on the mass as well as the velocity for something. 2. If the mass of something is 2 times the mass of something else, how does this change the momentum? a. The momentum will be doubled. b. The momentum will be the square of 2 or will be quadrupled. c. The momentum will be the same. d. The momentum will be one-half the mass of the smaller object. Answer: a. The momentum of something is directly proportional to its mass so it will double if the mass of an object doubles. 3. What are the SI units for impulse? a. Newton-seconds b. Joules per second c. Newtons d. Kilograms per square meter per second Answer: a. The SI unit will be in Newton-seconds, which means the amount of force applied over a period of time. Remember that impulse is the same as the change in momentum.
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