Question

Two skaters collide and embrace in an inelastic collision.
Alex's mass is 90 kg and his initial velocity is 1.5 m/s
** i** . Barbara's mass is 57 kg and her
initial velocity is 2.0 m/s

A. |
2.0 m/s |

B. |
1.7 m/s |

C. |
1.6 m/s |

D. |
1.5 m/s |

E. |
1.2 m/s |

Answer #1

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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.

Two ice skaters, Daniel (mass 69.0 kg) and Rebecca (mass 51.0
kg) are practicing. Daniel stops to tie his shoelace and, while at
rest, is struck by Rebecca, who is moving at 13.5 m/s before she
collides with him. After the collision, Rebecca has a velocity of
magnitude 6.3 m/s at an angle of 51.5° from her initial direction.
Both skaters move on the frictionless, horizontal surface of the
rink.
(a) What are the magnitude and direction of Daniel's velocity...

Two ice skaters, Daniel (mass 65.0 kg ) and Rebecca (mass 45.0
kg ), are practicing. Daniel stops to tie his shoelace and, while
at rest, is struck by Rebecca, who is moving at 14.0 m/s before she
collides with him. After the collision, Rebecca has a velocity of
magnitude 8.00 m/s at an angle of 55.1 ∘ from her initial
direction. Both skaters move on the frictionless, horizontal
surface of the rink.
a.What is the magnitude of Daniel's velocity...

Two ice skaters, Daniel (mass 70.0 kg ) and Rebecca (mass 45.0
kg ), are practicing. Daniel stops to tie his shoelace and, while
at rest, is struck by Rebecca, who is moving at 13.0 m/s before she
collides with him. After the collision, Rebecca has a velocity of
magnitude 8.00 m/s at an angle of 55.1 ∘ from her initial
direction. Both skaters move on the frictionless, horizontal
surface of the rink.
Part A What is the magnitude of...

Two masses collide in an elastic collision,
with the following initial values:
m1 = 2 kg
m2 = 3 kg
v01 = 5 m/s
v02 = -4 m/s
Use the conservation rules, and algebra, what is the final
velocity of mass 1, vf1 in m/s?

Two ice skaters, Daniel (mass 65.0 kg ) and Rebecca (mass 45.0
kg ), are practicing. Daniel stops to tie his shoelace and, while
at rest, is struck by Rebecca, who is moving at 12.0 m/s before she
collides with him. After the collision, Rebecca has a velocity of
magnitude 8.00 m/s at an angle of 54.1 ∘ from her initial
direction. Both skaters move on the frictionless, horizontal
surface of the rink.
Part A
Part complete
What is the...

Two ice skaters, Daniel (mass 65.0 kg ) and Rebecca (mass 45.0
kg ), are practicing. Daniel stops to tie his shoelace and, while
at rest, is struck by Rebecca, who is moving at 12.0 m/s before she
collides with him. After the collision, Rebecca has a velocity of
magnitude 8.00 m/s at an angle of 54.1 ∘ from her initial
direction. Both skaters move on the frictionless, horizontal
surface of the rink.
Part A
Part complete
What is the...

Two ice skaters, Daniel (mass 65 kg) and Rebecca (mass 45 kg),
are practicing. Daniel stops to tie his skate lace and, while at
rest, is struck by Rebecca who is moving at 13.0 m/s before she
collides with him. After the collision, Rebecca has a velocity of
magnitude 8.00 m/s at an angle of 53.1 from her initial direction.
Both skaters move on the frictionless, horizontal surface of the
rink. 1) Determine the magnitude of the x-component Daniel's
velocity...

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

Consider a perfectly inelastic collision, where
two objects collide with each other, and stick together. The net
external force on the system is 0.
m1 = 2 kg
m2 = 3 kg
v01 = 5 m/s
v02 = -4 m/s
a) What is their final velocity, after the collision, in m/s?
Make sure you get the correct sign.
b) How much kinetic energy was lost in the collision, in
Joules?

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