Development of misconception diagnostic test in momentum and. Momentum and impulse live grade 12 learn xtra easter school 2015. To introduce the ideas of impulse and momentum and to learn a new problemsolving strategy based on conservation laws. Circle the letter of the most correct choice for each of the following. The pdf version of the teacher toolkit on the topic of impulse and momentum change is displayed below. Momentum and impulse unit three lessons covering momentum, impulse and conservation of mementum. Each lesson has a lecture component and a series of questions which reinforce the material. Impulse and momentum the impulse of a force is the product of the force and the time interval during which it acts.
Below are the materials for unit 6 momentum and impulse. Impulse a change in momentum in a short time requires a large force. Again, this is a vector equation, so the change in momentum is in the same direction as the force. Unit 4 work, energy and momentum mr trasks physics. Impulse is a way to measure a change in momentum because it is not always possible to calculate force and time individually since collisions happen so fast. Mar 14, 2017 as much as we commonly misuse scientific words in common language, we do have a reasonable grasp of the word momentum. The momentum change of an object is the massvelocity change. Sat subject test in physics a ball hits a brick wall with a velocity of and bounces back at the same speed. For the second part of the problem, equation 3 must be rearranged for. Two objects with the same mass will always have the same momentum. Which of the following are not a way to express the units of momentum. The graph below shows the force which acts on a 7kg object over a time interval of 8 seconds. Momentum and impulse practice problems physics academic classroom practice 1. A car of mass m, traveling at speed v, stops in time t when maximum braking force is applied.
Chapter 6 practice test momentum and collisions multiple choice identify the letter of the choice that best completes the statement or answers the question. The total momentum of the system is conserved during the collision. When a pitcher throws a ball to the catcher, accelerating the ball from rest, the force he exerts on the ball in the process a. Momentum and impulse in the last lesson we define impulse as the product of the net force and the contact time. If youre seeing this message, it means were having trouble loading external resources on our website. Impulse and momentum study guide flashcards quizlet. The physics classroom grants teachers and other users the right to print this pdf document and to download this pdf document for private use.
Learn what momentum and impulse are, as well as how they are related to force. In sports, impulse is called the follow through impulse. Impulse impulse is defined as the product of force and the time for which it is applied. For one particle p mv for a system of multiple particles p p i m i v units. The momentum of a moving mass is a vector which has a direction that is the same as the velocity of the mass. Pdf chapter 6 momentum and impulse doane college chapter 6 momentum and impulse 6.
Determine how much mechanical energy was converted to heat in the collision. Determine the impulse acting on the ball while it is being hit if its momentum after being hit is 5. The momentum concepts included the definition of momentum, impulse momentum theorem impulse was defined explicitly in the test, and. Additional materials will be added as we move through the unit.
Therefore the impulse is equal to the final momentum of the ball, or the momentum imparted to the ball from the player. A rubber ball moving at a speed of 5 ms hit a flat wall and returned to the thrower at 5 ms. The product of the mass of an object and its velocity. When giving the linear momentum of a particle you must specify its magnitude and direction. It has the same direction as corresponding velocity. To determine the momentum of a particle to add time and study the relationship of impulse and momentum to see when momentum is conserved and examine the implications of conservation to use momentum as a tool to explore a variety of collisions to understand the center of mass. Learn vocabulary, terms, and more with flashcards, games, and other study tools. By combining the impulsemomentum equation with the rtt applied to mass i. A guide to momentum and impulse teaching approach in this series we investigate momentum and impulse. Thus, the momentum of an object can be broken down into its components. The momentum p of an object is the product of the mass m of the object and its velocity v. We calculate the momentum of a moving object and explain the relationship between net force and change in momentum for a.
Momentum is not equal to the mass of an object divided by its velocity. A 0 kg race car is traveling at 80 ms while a 15,000 kg truck is traveling at 20 ms. Impulse and momentum practice the physics hypertextbook. The fourth really important point about momentum is that momentum is conserved. Impulse is a vector quantity, and can also be calculated by finding the area under a force versus time curve. Impulse and momentum new providence school district. Which of the following equations can be used to directly calculate an objects momentum, p. The change in momentum of a particle during a time interval. Mass goes down when we replace the pound grizzly bear with a 250 pound man. The impulse experienced by an object is the forcetime. A 640 g toy car moving east has a kinetic energy of 0.
Use the impulsemomentum change principle to fill in the blanks in the following rows of the table. Explosions and collisions obey some surprisingly simple laws that make problem solving easier when comparing the situation before and after an interaction. Pdf multiplechoice test of energy and momentum concepts. Define a types of collisions 2 pt b law of momentum conservation 1 pt.
Unit 6 youtube videos for each section of the notes. This test covers momentum, impulse, conservation of momentum, elastic collisions, inelastic collisions, perfectly inelastic collisions, 2d collisions, and centerof. The vector quantity for impulse is represented by the letter j, and since its a change in momentum, its units can be one the same as those for momentum, kgms, and can also be written as a newtonsecond ns. Multiplechoice test of energy and momentum concepts. Momentum is the product of mass and velocity, which makes the two quantities inversely proportional.
As much as we commonly misuse scientific words in common language, we do have a reasonable grasp of the word momentum. Momentum is a vector quantity, and thus the total linear momentum of a system of objects is the vector sum of the individual momenta of the objects in the system. But thats no reason to gloss over this concept, we have to know all the. How fast would a 200 kg snowmobile need to travel to have the same momentum. We use the impulsemomentum theorem to calculate the force or change in momentum for a variety of situations. Impulse the product of a force and the time the force acts is called the impulse.
By combining the impulse momentum equation with the rtt applied to mass i. Calculate the impulse the object experiences due to its weight after falling for 10 s. Solution impulse ft 400 x 20 8000 n s momentum momentum is defined as the product of mass and velocity. Momentum impulse impulse is very closely related to momentum. This test covers momentum, impulse, conservation of momentum, elastic collisions, inelastic collisions, perfectly inelastic collisions, 2d collisions, and centerofmass, with some problems requiring a knowledge of basic calculus.
On a graph of f x versus time, the impulse is equal to the area under the curve, as shown in figure to the right. A student with mass m is standing on a wooden plank of mass m that is less than the mass of the student. Other results for ap physics practice test impulse momentum answers. If youre behind a web filter, please make sure that the domains.
When a ball with mass is thrown with a velocity, the ball has a kinetic energy of 10 and a momentum 3. Determine the magnitude of the average force acting on the 500g. Although the momentum of the bus is very large compared to the momentum of the bug, the change in momentum of the bus compared to the change in momentum of the bug is, a. We then look at the law of conservation of momentum and distinguish between elastic and inelastic collisions. Higher momentum and impulse questions larbert high school. A force acting for a certain time this is known as an impulse produces a change in momentum. In a ballistics test, a 25 g bullet traveling horizontally at. Development of misconception diagnostic test in momentum and impulse the improvement of. Determine the magnitude of the average force acting on the 500g cart during the collision.
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