Question

Two wooden pucks approach each other on an ice rink as shown in the figure. Puck #2 has an initial speed of 4.14 m/s and a mass that is some fraction f = 2 3 that of puck #1. Puck #1 is made of a hard wood and puck #2 is made of a very soft wood. As a result, when they collide, puck #1 makes a dent in puck #2 and 13.2% of the initial kinetic energy of the two pucks is lost. Before the collision, the two pucks approach each other in such a manner their momentums are of equal magnitude and opposite directions. Determine the speed of the two pucks after the collision.

Answer #1

The mass of the blue puck shown below is 35.0% greater than the
mass of the green puck. Before colliding, the pucks approach each
other with momenta of equal magnitudes and opposite directions, and
the green puck has an initial speed of 11.0 m/s. Find the speeds
the pucks have after the collision if half the kinetic energy of
the system becomes internal energy during the collision.
vgreen = m/s
vblue = m/s

Two titanium spheres approach each other head-on with the same
speed and collide elastically. After the collision, one of the
spheres, whose mass is 250 g, remains at rest. (a) What is the mass
(in g) of the other sphere? (b) What is the speed of the two-sphere
center of mass if the initial speed of each sphere is 4.5 m/s?

Two particles approach each other with equal and opposite speed
v. The mass of one particle is m, and the mass of the other
particle is nm, where n is just a unitless number. Snapshots of the
system before, during, and after the elastic collision are shown
above. After the collision the first particle moves in the exact
opposite direction with speed 2.40v, and the speed of the second
particle is unknown. What is the value of n?

Two hockey players hit each other on the ice. Player 1 is of
mass 110 kg and is moving 70 degrees East of South at
8 m/s. Player 2 is of mass 140 kg and is moving 50 degrees North of
West at 12 m/s. They collide and stick together.
Sketch the situation.
(a) Find the velocity of the vehicles after the collision.
(b) Find the impulse on car1 during the collision.
(c) Which car experiences the larger change in...

Two hockey players hit each other on the ice. Player 1 is of
mass 110 kg and is moving 70 East of South at 8 m/s. Player 2 is
of mass 140 kg and is moving 50 North of West at 12 m/s. They
collide and stick together. Sketch the situation. (a) Find the
velocity of the vehicles after the collision. (b) Find the impulse
on car1 during the collision. (c) Which car experiences the larger
change in the magnitude...

Two cars approach an intersection at a right angle to each
other. If an inelastic collision occurs at the
intersection, determine the x component of the final momentum of
the combined vehicles. Car 1 of mass 865 kg approaches
the intersection from the left with a speed of 19.49
m/s. Car 2 of mass 1,121.17 kg approaches the
intersection from the south with a speed of 14.98 m/s.

Questions (use complete sentences)
1) What is a conservation law? What is the basic approach taken
when using a conservation law?
2) Could the linear momentum of a turtle be greater than the
linear momentum of a horse? Explain.
3) Carts A and B stick together whenever they collide. The mass
of A is twice that of B. How could you roll the carts so that they
would be stopped after a collision?
4) How can a satellite’s speed decrease...

Two asteroids in space that are near each other experience a
force of 5,107 N due to the gravitational force between
them. If their positioning was changed so that they were
spaced 2 times their original distance apart, what would the new
force of attraction between them be?
A Ferris wheel at a carnival has a radius of 12 m and turns so
that the speed of the riders is 4.9 m/s. What is the magnitude of
the centripetal acceleration that...

Two cars moving with same speed 10 m/s but in the opposite
directions pass each other at t=0. At that instant they both start
to slow down with the same magnitude of acceleration
2 m / s2
1-) What ist the maximum distance between the
cars ? How long does it take them to be at the same position again
?
2-) Plot the position vs. time graph of the
cars qualitatively.

In a game a few years ago, two football players crash into each
other during a tackle. The first player (mass 115 kg) is traveling
at 5.78 m/s, at an angle of 49.4 degrees south of east. The second
player (mass 98.0 kg) is traveling at 7.94 m/s, at an angle of 40.4
degrees north of east. The two players then collide, and stick
together right after the collision. Define north as positive y and
east as positive x.
A....

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