The total momentum for any system of objects is constant so long as the following is true. (Select all that apply.) so long as no unbalanced (or net) external forces act on the objects in the system so long as only conservative forces act between the objects in the system The total momentum for any system of objects is always constant. Kinetic energy for any system of objects is constant so long as the following is true. (Select all that apply.) Oso long as no unbalanced (or net) external forces act on the objects in the system O so long as only conservative forces act between the objects in the system

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The total momentum for any system of objects is constant so long as the following is true. (Select all that apply.)
O so long as no unbalanced (or net) external forces act on the objects in the system
O so long as only conservative forces act between the objects in the system
The total momentum for any system of objects is always constant
Kinetic energy for any system of objects is constant so long as the following is true. (Select all that apply.)
O so long as no unbalanced (or net) external forces act on the objects in the system
so long as only conservative forces act between the objects in the system
The total momentum for any system of objects is always constant.
Using ratios to study collisions
As long as a system of objects begins with non-zero momentum, we can use the ratio of the magnitude of the total momentum after the collision to the
magnitude of the total momentum before the collision,
to show the degree to which momentum was conserved during the collision.
For example, consider a collision between a stationary cart and a moving cart on a low friction surface. We would expect the ratio p/p, to be which of
the following?
O equal to 1
much greater than 1
O much less than 1
equal to 0
Considering a collision where only conservative forces act between objects in the system, we'd expect that the ratio of KE/KE, would be equal to which
of the following?
equal to 1
much greater than 1
much less than 1
O equal to 0
When considering the momentum of objects moving on a horizontal surface, we can ignore the effects of the vertical forces, such as the force of earth's
gravity and the force of the surface, because of which of the following?
They do not sum to an unbalanced force.
They are external to the system.
They are conservative forces.
They are too small to affect the motion.
Transcribed Image Text:The total momentum for any system of objects is constant so long as the following is true. (Select all that apply.) O so long as no unbalanced (or net) external forces act on the objects in the system O so long as only conservative forces act between the objects in the system The total momentum for any system of objects is always constant Kinetic energy for any system of objects is constant so long as the following is true. (Select all that apply.) O so long as no unbalanced (or net) external forces act on the objects in the system so long as only conservative forces act between the objects in the system The total momentum for any system of objects is always constant. Using ratios to study collisions As long as a system of objects begins with non-zero momentum, we can use the ratio of the magnitude of the total momentum after the collision to the magnitude of the total momentum before the collision, to show the degree to which momentum was conserved during the collision. For example, consider a collision between a stationary cart and a moving cart on a low friction surface. We would expect the ratio p/p, to be which of the following? O equal to 1 much greater than 1 O much less than 1 equal to 0 Considering a collision where only conservative forces act between objects in the system, we'd expect that the ratio of KE/KE, would be equal to which of the following? equal to 1 much greater than 1 much less than 1 O equal to 0 When considering the momentum of objects moving on a horizontal surface, we can ignore the effects of the vertical forces, such as the force of earth's gravity and the force of the surface, because of which of the following? They do not sum to an unbalanced force. They are external to the system. They are conservative forces. They are too small to affect the motion.
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