Quiz_ Reading_ Particle Kinetics, Impulse and Momentum

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3/11/24, 9:44 AM Quiz: Reading: Particle Kinetics, Impulse and Momentum: ENGR240: Dynamics (001) https://canvas.liberty.edu/courses/601780/quizzes/2671247?module_item_id=60443119 1/6 Quiz: Reading: Particle Kinetics, Impulse and Momentum Due Mar 4 at 11:59pm Points 12 Questions 12 Available Feb 28 at 12am - Mar 6 at 11:59pm Time Limit 60 Minutes Instructions This quiz was locked Mar 6 at 11:59pm. Attempt History Attempt Time Score LATEST Attempt 1 32 minutes 11 out of 12  Correct answers are hidden. Score for this quiz: 11 out of 12 Submitted Feb 29 at 4:05pm This attempt took 32 minutes.  Question 1 1 / 1 pts the conservation of linear impulse. the conservation of linear impulse and linear momentum. conservation of mass and velocity. the conservation of linear momentum.  The quiz: Covers the Textbook material from Module 6 – Module 7 (Chapter 15) . Contains 12 multiple-choice and true/false questions. Is limited to 35 minutes . Allows 1 attempt . Is worth 12 points . The equation ∑ m ( V ) = ∑ m ( V ) is referred to as ________________________. i i 1 i i 2 Online Residential Athletics Sign In Request Info Apply Now Visit Us Create Guest Account

3/11/24, 9:44 AM Quiz: Reading: Particle Kinetics, Impulse and Momentum: ENGR240: Dynamics (001) https://canvas.liberty.edu/courses/601780/quizzes/2671247?module_item_id=60443119 2/6 Question 2 1 / 1 pts the principle of force and momentum the principle of linear impulse and momentum the principle of angular impulse and momentum the principle of force and impulse  Question 3 1 / 1 pts linear momentum, impulse impulse, linear momentum angular momentum, impulse velocity product, force product  Question 4 1 / 1 pts 200 Ns 250 Ns 150 Ns 300 Ns The total impulse is the area under the F-t plot, which is 150 Ns. The equation ∑∫ F dt = m V - m V (where F is force, m mass, t time, and V is velocity) is referred to as ______________________. 2 1 In the equation ∑∫ F dt = m V - m V , the terms m V and ∫ F dt are called _______________ and _____________, respectively. 2 1 If a force that varies as shown on the graph acts on a particle, what is the total impulse exerted by the force?

3/11/24, 9:44 AM Quiz: Reading: Particle Kinetics, Impulse and Momentum: ENGR240: Dynamics (001) https://canvas.liberty.edu/courses/601780/quizzes/2671247?module_item_id=60443119 3/6  Question 5 1 / 1 pts True False Yes, linear momentum L is the product of mass and velocity (given by m V ). Since m is a positive scalar quantity, L has the same direction as V .  Question 6 1 / 1 pts Only the externally applied forces The forces that have larger magnitudes. Internal forces. Both internal and externally applied forces. Internal forces don't appear in the summation since they occur in equal and opposite collinear pairs, and therefore they cancel out. A particle's linear momentum is a vector quantity and has same direction as the particle's velocity. The ±gure shows a system of particles moving relative to an inertial reference frame. The forces acting on some of the particles are shown in the ±gure. Externally applied forces are represented by upper case F and internal forces are represented by lower case f letters. The principle of linear impulse and momentum for a system of particles if given by ∑ m ( V ) + ∑∫ F dt = ∑ m ( V ) . Which of the forces are included in the F dt summation? i i 1 i i i 2 i

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3/11/24, 9:44 AM Quiz: Reading: Particle Kinetics, Impulse and Momentum: ENGR240: Dynamics (001) https://canvas.liberty.edu/courses/601780/quizzes/2671247?module_item_id=60443119 4/6  Question 7 1 / 1 pts When the total force acting on the system is maximum. When the internal impulses acting on the system is zero. When the external impulses acting on the system is zero. When the total linear momentum is maximize. Linear momentum on the system is conserved when the external impulses acting on a particle is zero.  Question 8 1 / 1 pts The total internal impulses for a system of particles is always zero. The forces causing very signi±cant impulses are called nonimpulsive forces. Force which are very large and act for a very short period of time and produce a signi±cant change in momentum are called impulsive forces. Some external forces that act for very short time may produce negligible impulses (and are called nonimpulsive forces), and therefore can be disregarded during computation. See section 15.3 on your textbook for more information  Question 9 1 / 1 pts What is the condition for the linear momentum of the system of particles to remain constant during the time period t to t ? 1 2 Which of the following statement(s) is/are correct? The ±gure shows the momentum m V of a particle at location 1 as the particle moves along a path on the x-z plane. If d is the shortest distance between the origin of the reference frame and the line of action of the momentum, the product of d and the magnitude of m V is called ______________.

3/11/24, 9:44 AM Quiz: Reading: Particle Kinetics, Impulse and Momentum: ENGR240: Dynamics (001) https://canvas.liberty.edu/courses/601780/quizzes/2671247?module_item_id=60443119 5/6 moment. angular velocity. angular momentum. angular impulse. The moment of linear momentum (m V ) at a point is called angular momentum. It is sometimes called moment of momentum.  Question 10 1 / 1 pts principle of linear impulse and momentum. principle of linear momentum and angular impulse. principle of angular impulse and angular momentum. principle of linear impulse and angular momentum. The terms ( H ) and ( H ) are angular momenta and ∑∫ M dt is angular impulse. Hence the equation ( H ) + ∑∫ M dt = ( H ) is called the principle of angular impulse and angular momentum.  Question 11 1 / 1 pts True False The equation ( H ) + ∑∫ M dt = ( H ) (where ( H ) and ( H ) are the initial and ±nal angular momenta at instants of time t and t , and ∑∫ M dt is the angular impulse) is called ____________________. (Choose the closest one) o 1 o o 2 o 1 o 2 1 2 o o 1 o 2 o o 1 o o 2 Direction of linear momentum and angular momentum are always mutually perpendicular.

3/11/24, 9:44 AM Quiz: Reading: Particle Kinetics, Impulse and Momentum: ENGR240: Dynamics (001) https://canvas.liberty.edu/courses/601780/quizzes/2671247?module_item_id=60443119 6/6 Angular momentum always acts normal to the plane on which the linear momentum acts.  IncorrectQuestion 12 0 / 1 pts negative. positive. zero. can't be determined unless the values of the forces and their position vectors are given. The moment of all internal forces about O is always zero as the internal forces occur in equal but opposite collinear pairs. Quiz Score: 11 out of 12 The ±gure shows a system of particles with both external force and internal force acting on the i th particle. The sum of the moments of these forces about O, { ∑ ( r x F ) + ( r x f ) }. The value of ( r x f ) is always _______________. i i i i i i

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