PHYSICS 1A03 Study Guide - Final Guide: Inelastic Collision, Elastic Collision, Net Force

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PHYSICS 1A03 Full Course Notes

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In the absence of external forces, the momentum of the system is conserved. Inelastic collision- if the kinetic energy is converted into other forms of energy in which the total momentum of the system stays constant during the collision. If the net force is constant (force times delta t) Impulse doesn"t always have to be a rectangle it can be any weird shape. Impulse is always the area under the curve. If it was perfectly inelastic both the objects would have the same final velocities- if they don"t then they are not perfectly inelastic: to end up with 0 momentum the triangle pieces have to be equal to 0. Mathematical description of a wave pulse: phase of the wave. Periodic waves: periodic wave- if the end of a rope is disturbed repeatedly, harmonic waves can be represented by a sine or cosine function, wave number (k)- encodes the wavelength information into the wave function.

Related Questions

In this problem we will consider a collision of two moving objects such that after the collision, the objects stick together and travel off as a single unit. The collision is therefore completely inelastic.

You have probably learned that "momentum is conserved" in an inelastic collision. But how does this fact help you to solve collision problems? The following questions should help you to clarify the meaning and implications of the statement "momentum is conserved."

1)What physical quantities are conserved in this collision?
a) the magnitude of the momentum only
b) the net momentum (considered as a vector) only
c) the momentum of each object considered individually

2) Two cars of equal mass collide inelastically and stick together after the collision. Before the collision, their speeds are V1 and V2 . What is the speed of the two-car system after the collision?
g)The answer depends on the directions in which the cars were moving before the collision.

3) Two cars collide inelastically and stick together after the collision. Before the collision, the magnitudes of their momenta are P1 and P2. After the collision, what is the magnitude of their combined momentum?

a) P1+P2
b) P1-P2
c) P2-P1
d)(P1P2)^(1/2)
e) (1/2)(P1+P2)
f)(P1+P2)^(1/2)
g)The answer depends on the directions in which the cars were moving before the collision.

4) Two cars collide inelastically and stick together after the collision. Before the collision, their momenta are p1 and p2. After the collision, their combined momentum is vector p. Of what can one be certain?

a) Vector P= p1+p2
b) Vector P= p1-p2
c) Vector P= p2-p1

taupecamel748

In this problem, let us consider that the two moving objects undergo collision such that after the collision, the objects stick together and travel off as a single unit. This is totally inelastic form of collision.

You are probably familiar that "momentum is conserved" in an inelastic collision. Solve the questions given below to clarify the meaning and implications of "momentum is conserved."

1)What physical quantities are conserved in this type of inelastic collision?
a) the magnitude of the momentum only
b) the net momentum (considered as a vector) only
c) the momentum of each object considered individually

2) Two cars of equal mass collide inelastically and stick together after the collision. Before the collision, their speeds are V1 and V2 . What is the speed of the two-car system after the collision?
a) V1+V2
b) V1-V2
c) V2-V1
d)(V1V2)^(1/2)
e) (1/2)(V1+V2)
f)(V1+V2)^(1/2)
g)The answer depends on the directions in which the cars were moving before the collision.

3) Two cars collide inelastically and stick together after the collision. Before the collision, the magnitudes of their momenta are P1 and P2 . After the collision, what is the magnitude of their combined momentum?

a) P1+P2
b) P1-P2
c) P2-P1
d)(P1P2)^(1/2)
e) (1/2)(P1+P2)
f)(P1+P2)^(1/2)
g)The answer depends on the directions in which the cars were moving before the collision.

4) Two cars collide inelastically and stick together after the collision. Before the collision, their momenta are p1 and p2. After the collision, their combined momentum is vector p. Of what can one be certain?

a) Vector P= p1+p2
b) Vector P= p1-p2
c) Vector P= p2-p1

aquamarineswan704

In a collision between an electron and a hydrogen atom, it isuseful to select both objects as the system because which ofthese:

The total momentum of the system does notchange during the collision.

During the time interval justbefore to just after the collision, external forces arenegligible.

The kinetic energy of atwo-object system is nearly zero.

The sum of the final kineticenergies must equal the sum of the initial kinetic energies for atwo-object system.

The forces the objects exert oneach other are internal to the system and don't change the totalmomentum of the system

PHYSICS 1A03 Study Guide - Final Guide: Inelastic Collision, Elastic Collision, Net Force

PHYSICS 1A03 Full Course Notes

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