![]() Calvin, the little boy, has a mass of 25.1 kg. 002 seconds to come to a complete stop, how much force did Kramer’s forehead provide? Diagram: (Given + Unknowns) Equation: Substitute:ġ7) Hobbes, the stuffed tiger, has a mass of 31.8 kg. Which scaled vector best represents the momentum of the system after they collide? A) C)ġ6) Keith Hernandez’s 0.010 kg spit ball was traveling at 12 m/s when it hit Kramer’s forehead. ![]() Solve: _ 15) In the diagram below, scaled vectors represent the momentum of each of two masses, A and B, sliding towards each other on a frictionless horizontal surface. Diagram: (Given + Unknowns) Equation: Substitute: Determine the time the plane takes to go from rest to 78 m/s. Suppose that liftoff for a plane will occur at 78 m/s. A fully loaded 400,000 kg Boeing 747 gets a total of 1.1 x 106 N of thrust from it jet engines. The ball is rolling down and along the curved slope.ġ4) Airplanes maneuver on the ground by using thrust from their jet engines. Solve: 13) Using the picture below, rank from least to greatest the ball’s momentum at each point. Calculate the velocity of the Corvette after the collision if the tractor trailer and Corvette do not stick together. The velocity of the tractor trailer after the collision is 1 m/s to the north. By looking at this data, what type of collision (elastic or inelastic) was this? How do you know? Type of Collision: Why:ġ2) A 25,000 kg tractor trailer traveling 3 m/s towards the north crashes into a 1200 kg Corvette traveling 2m/s towards the north. 11) After calculating the Kinetic Energy for the carts in the lab, a student records that he had a total of 10J of Kinetic energy before the collision and only 4.8J of Kinetic Energy after the collision. _ 10) Suppose that the change of momentum of an car remains constant, increasing the time the average force is applied will have what effect on the average force. _ 9) If the momentum of an object triples with the mass remaining constant, what happens to the velocity? A) Velocity triples. D) The bullet is moving at a much higher velocity than the locomotive. C) The locomotive is moving at much higher velocity than the bullet. B) The bullet and the locomotive must have the same velocity. What is the best explanation for this? A) The bullet and locomotive have the same mass. He finds that the momentum of the two objects is equal. _ 8) Superman is asked to calculate the momentum of two objects in motion, a speeding bullet and a locomotive. ![]() C) The impulse remained the same D) You can’t tell because you don’t know the stopping force. Later, when the brakes are wet you stop the same car from the same velocity but the time it takes 2.0 seconds, what is the difference in the impulse? A) The impulse increased, because the time increased B) The impulse decreased, because the time decreased. _6) Which of the following scenarios would be considered approximately an elastic collision? A) playing tennis C) an archer’s arrow piercing a target B) coupling two train cars together D) Both B and C _7) You are driving a truck on a highway from a velocity of 25 m/s, you apply the brakes and stop the truck in 1.5 seconds. The fighter receiving the punch “rolls with the punch” so as to: A) increases the time of contact, and therefore decrease the average force of the punch B) decrease the time of contact, and therefore increase the average force of the punch C) decrease the mass of the boxing glove D) increase the mass of the boxing glove. Which undergoes the greater change is momentum? A) the bug B) the car C) both the same _ 5) The momentum of a punch is changed by a fighter’s jaw. _ 3) A force applied over time would create which of the following? A) impulse C) Both A and B B) change in momentum D) Neither A nor B _4) You're driving down the highway and a bug spatters into your windshield. ![]() _ 2) The quantity 8 kg m/s is equivalent to which of the following A) 8 N B) 8 N * s C) 8 N / s Momentum, Impulse, and Collision Review Fill in the following UNITS only table Quantity Mass
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