Homework Answers
In case of a closed (or an isolated) system, the total momentum of the system is conserved and the net force on the system is zero.
Option (ii) & (iii) are the correct choices
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Question 2 1 pts What defines a closed (or isolated) system? Choose ALL correct responses. It...
Please choose all that are correct. Select one or more: O a. To maintain the same...
Please choose all that are correct. Select one or more: O a. To maintain the same acceleration, when the force applied is halved, mass must also be halved O b. If there is only one force acting on an object, that force is equal to the net force O c. A force cannot be negative O d. An object flying through vacuum does not have a normal force acting on O e. Friction is a fundamental force O f. An...
True-False (2 points each). Circle the correct answer. 1) D F An isolated system has a...
True-False (2 points each). Circle the correct answer. 1) D F An isolated system has a net external force of zero. 2)TF Momentum is conserved in an isolated system. 3) TT The definition of work is W = Fdcos(0) 4) T (F) The spring force is proportional to the displacement of the spring end. 5) O T Engines and generators can be 100% efficient. 6) DF The impulse is equal to the change in momentum. 7) DF In an isolated...
Question 21 1 pts The direction of the buoyancy force on a rock that sits on...
Question 21 1 pts The direction of the buoyancy force on a rock that sits on the bottom of a lake is down. up. zero. There is no buoyancy force when the rock is on the bottom. impossible to determine. Question 22 3 pts When an object is falling in air at terminal velocity, (choose all correct answers) the net force on the object is down. the net force on the object is zero. the net force on the object...
1] As a projectile is flying (following the standard projectile motion seen in class), it lodes...
1] As a projectile is flying (following the standard projectile motion seen in class), it lodes for an unknown reason not due to external intervention. Which one of suddenly exp the following statements is correct? Only one of them is. A Both kinetic energy and linear momentum are conserved B Kinetic energy is conserved, but linear momentum may not be conserved. C Neither linear momentum nor kinetic energy are conserved. D Linear momentum is conserved, but kinetic energy may not...
Question 1 What type of friction occurs when a body is already sliding in motion? Which...
Question 1 What type of friction occurs when a body is already sliding in motion? Which direction is this friction force pointing? What does this say about the net force on the object now?
Question 3 1 pts Four-chambered hearts are found in O all of these responses are correct...
Question 3 1 pts Four-chambered hearts are found in O all of these responses are correct O mammals O birds O crocodilians O none of these responses are correct D Question 4 1 pts When speaking of the pulmonary circuit in the cardiovascular system, pulmonary refers to blood flowing between the _&__ O heart & lungs O heart, brain O heart, vessels supplying blood to the heart itself heart, everywhere except the lungs O none of these responses are correct
do them all Question 1 1 pts What is the closed-loop time constant for the system...
do them all
Question 1 1 pts What is the closed-loop time constant for the system shown? R(s) C(s) Question 2 1 pts What is the closed-loop gain for the system shown? Ris) cls) 5+5 10 Question 3 1 pts What is the steady-state value for Cin the following system? R(ડો. C(s) 8 32 +48 +4 10 Question 4 1 pts What is the natural frequency of the closed-loop system shown? R(s) C(s) 8 32 +48 +4 10 Question 5...
8 When an object experienices unicem cinsular motion, the direction of the net fonce is b....
8 When an object experienices unicem cinsular motion, the direction of the net fonce is b. in the opposite direction of the motion of the objoct d. is directed sway from the center of the ciculr path 9. Compared to its mass on the Farth, the mass of an object on the Moon is less b. more c the same d half as moch 10. Can work be done on a system if there is no motion? b. yes, since...
Question 1 20 pts For which of the following scenarios would the total momentum of the...
Question 1 20 pts For which of the following scenarios would the total momentum of the system not be conserved? Select all that apply. A bullet is shot at a downward angle (below the horizontal) into a block of wood at rest on a horizontal, frictionless surface. The system consists of the bullet and the block. Two balls moving in free fall motion such that they collide while one ball is moving downward and the other ball moving upward. The...
1. Write Newton's 2nd Law in terms of momentum, p. 2. Why is momentum a more...
1. Write Newton's 2nd Law in terms of momentum, p. 2. Why is momentum a more physically fundamental quantity than velocity? 3. In terms of forces, what would the universe be like, qualitatively if, instead, momentum were p=>? 4. A finite collection of particles is contained in a box. The particles collide elastically with one another and the interior of the box. If we consider only the particles, then what, if any, forces are External Forces? 5. Determine the total...
Please choose all that are correct. Select one or more: O a. To maintain the same acceleration, when the force applied is halved, mass must also be halved O b. If there is only one force acting on an object, that force is equal to the net force O c. A force cannot be negative O d. An object flying through vacuum does not have a normal force acting on O e. Friction is a fundamental force O f. An...
True-False (2 points each). Circle the correct answer. 1) D F An isolated system has a net external force of zero. 2)TF Momentum is conserved in an isolated system. 3) TT The definition of work is W = Fdcos(0) 4) T (F) The spring force is proportional to the displacement of the spring end. 5) O T Engines and generators can be 100% efficient. 6) DF The impulse is equal to the change in momentum. 7) DF In an isolated...
Question 21 1 pts The direction of the buoyancy force on a rock that sits on the bottom of a lake is down. up. zero. There is no buoyancy force when the rock is on the bottom. impossible to determine. Question 22 3 pts When an object is falling in air at terminal velocity, (choose all correct answers) the net force on the object is down. the net force on the object is zero. the net force on the object...
1] As a projectile is flying (following the standard projectile motion seen in class), it lodes for an unknown reason not due to external intervention. Which one of suddenly exp the following statements is correct? Only one of them is. A Both kinetic energy and linear momentum are conserved B Kinetic energy is conserved, but linear momentum may not be conserved. C Neither linear momentum nor kinetic energy are conserved. D Linear momentum is conserved, but kinetic energy may not...
Question 3 1 pts Four-chambered hearts are found in O all of these responses are correct O mammals O birds O crocodilians O none of these responses are correct D Question 4 1 pts When speaking of the pulmonary circuit in the cardiovascular system, pulmonary refers to blood flowing between the _&__ O heart & lungs O heart, brain O heart, vessels supplying blood to the heart itself heart, everywhere except the lungs O none of these responses are correct
do them all
Question 1 1 pts What is the closed-loop time constant for the system shown? R(s) C(s) Question 2 1 pts What is the closed-loop gain for the system shown? Ris) cls) 5+5 10 Question 3 1 pts What is the steady-state value for Cin the following system? R(ડો. C(s) 8 32 +48 +4 10 Question 4 1 pts What is the natural frequency of the closed-loop system shown? R(s) C(s) 8 32 +48 +4 10 Question 5...
8 When an object experienices unicem cinsular motion, the direction of the net fonce is b. in the opposite direction of the motion of the objoct d. is directed sway from the center of the ciculr path 9. Compared to its mass on the Farth, the mass of an object on the Moon is less b. more c the same d half as moch 10. Can work be done on a system if there is no motion? b. yes, since...
Question 1 20 pts For which of the following scenarios would the total momentum of the system not be conserved? Select all that apply. A bullet is shot at a downward angle (below the horizontal) into a block of wood at rest on a horizontal, frictionless surface. The system consists of the bullet and the block. Two balls moving in free fall motion such that they collide while one ball is moving downward and the other ball moving upward. The...
1. Write Newton's 2nd Law in terms of momentum, p. 2. Why is momentum a more physically fundamental quantity than velocity? 3. In terms of forces, what would the universe be like, qualitatively if, instead, momentum were p=>? 4. A finite collection of particles is contained in a box. The particles collide elastically with one another and the interior of the box. If we consider only the particles, then what, if any, forces are External Forces? 5. Determine the total...
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