Question

Regarding the kinetic energy before and after the collision

Answer #1

The total system kinetic energy before the collision equals the total system kinetic energy after the collision. Elastic collisions are collisions in which both momentum and kinetic energy are conserved. If total kinetic energy is not conserved, then the collision is referred to as an inelastic collision.

Calculating kinetic energy before and after the collision:

The above calculation expects you to enter a final velocity for mass m1 and then it calculates the final velocity of the other mass required to conserve momentum and calculates the kinetic energy either gained or lost to make possible such a collision.

In an elastiv collision, is the kinetic energy of the object the
same before and after the collision? explain

Before a collision, two isolated masses have non-zero total
kinetic energy. After the collision, their total kinetic energy
cannot be zero.
Explain why the statement above is false.
Thank you for your time.

In
which collision was kinetic energy conserved?

Two carts of mass 50 kg have a collision. Before the collision,
the first cart was travelling to the right at 4 m/s, and the 2nd
cart was travelling to the left at 3 m/s. After the collision, the
carts stick together. a) 10 pts What is the velocity of the carts
immediately after the collision? b) 6 pts How much kinetic energy
was lost in the collision? Where did this energy go? c) 10 pts
After the carts have...

Two objects collide in a totally inelastic collision. Just
before the collision,
the objects have the following masses and velocities:
M1 = 4.5 kg, v1 = 1.5 m/s @ 140o. M2 = 1.5 kg, v2 = 1 m/s @
180o.
a) Find the velocity of the object after the collision.
b) How much kinetic energy was lost in the collision.

In a head-on collision of an electron of kinetic energy of 2.044
MeV with a positron at rest, the two particles are replaced by two
photons of equal energy. If each photon is traveling at an angles θ
with respect to the electron’s direction of motion, What is the
energy E, momentum p (you can leave the answer in terms of c) and
angle of θ of each photon? (For electron and positron mc2 = 0.511
MeV)

Two 1.7 kg bodies, A and B, collide. The
velocities before the collision are A = (14 +
34) m/s and B = (−15 + 9.0) m/s. After the
collision, 'A = (−4.0 + 18) m/s.
(a) What is the final velocity of B?
=
m/s
(b) What is the change in the total kinetic energy (including
sign)?
J

In which type(s) of collision is/are both the total momentum
before and the total momentum after the collision equal to
zero?
a. hit and stick and explosion
b. explosion
c. hit and stick
In which type(s) of collision is/are the total momentum before the
collision equal to the total momentum after the collision?
a. hit and stick
b. hit and rebound
c. explosion
d. all of the above

An electron initially at rest recoils after a head-on collision
with a 8.27-keV photon. Determine the kinetic energy acquired by
the electron.

A of a) b) c) d)
How much kinetic energy was lost in the collision.
A 15cm radius wheel begins to rotate about its center at an
angular speed 45 rads/s. It accelerates at 3.0 rad/s2 for 15s.
1. What is the final angular velocity and direction?
2. Find the velocity of a point on its rim.
3. How many revolutions does it make?
4. Find the average angular of the wheel from start to finish.

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