When is the momentum of a system conserved?
(a) Momentum is a conserved quantity, so it’s always conserved
(b) Only during collisions
(c) Only if the net internal force on the system is zero
(d) Only if the net external force on the system is zero
When is the momentum of a system conserved? (a) Momentum is a conserved quantity, so it’s...
If the total momentum of a system is a constant, then we say that the total momentum is conserved. A consequence of Newton’s laws of physics is that the total momentum of a system is conserved whenever the net external force on the system is zero. Describe all the external forces acting on this system and explain what the net external force is. Is it zero or approximately zero?
The sum of the kinetic and potential energies of a system of objects is conserved: only when no external force acts on the objects only when the objects move along closed paths O only when the work done by the resultant external force is zero O always none of the above
18 19 When objects stick together after colliding. A momentum is not conserved. B momentum is zero. the collision is inelastic. D. the collision is elastic. Work is done A any time a force is applied. B by all components of force. c. when an object moves in the direction of the net force. D by an applied force perpendicular to the direction of the motion A heavy truck has more momentum than a passenger car moving at the same...
under what conditions is mechanical energy conserved? only when conservative forces are present Only when the net talk on a system is zero only when the net force on the system is zero mechanical Everly is always conserved
V If two particles of different masses have equal kinetic energy they also have equal momentum. The kinetic energy is always conserved both in elastic collisions and inelastic collisions. If the momentum of a single particle is zero, its kinetic energy may not be zero. The linear momentum of an object is proportional to the mass of the object. A large force always produces a larger impulse on a body than a smaller force. If the kinetic energy of a...
Under what conditions is the momentum conserved in a collision a. It is always conserved. b. When it is an inelastic collision c. When the collision is very light. d. When the collision is totally elastic
Question 3: (2 pts.) When can you assume that momentum is conserved and the momentum before a collision and momentum after a collision should equal the same value? Explain using concepts of net force on the system of two carts as well as the forces on each individual cart.
1.Linear momentum is always conserved [ ]when kinetic energy is conserved [ ]when total energy is conserved [ ]in the absence of internal forces [ ]in the absence of external forces 2. If two objects collide and there are no other forces acting on them, the momentum of each object will be independently conserved. [ ]True [ ]False 3.The momentum of an object is equal to the product of it mass and ______ [ ]Velocity [ ]Speed [ ]displacement [...
The mechanical energy of a system is conserved when a.There is no net external force acting on the system b.The objects in the system are undergoing an elastic collision c.No non-conservative forces do work on the system. d.Both B and C. e.Both A and 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...