Question

Two 1.7 kg bodies, *A* and *B*, collide. The
velocities before the collision are * _{A}* = (14 +
34) m/s and

(a) What is the final velocity of *B*?

=

m/s

(b) What is the change in the total kinetic energy (including
sign)?

J

Answer #1

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 objects of mass 1.7 kg and 2.9 kg move with velocities (2.2,
0.5) and (2.9, 4.0) respectively (the two numbers are the x and y
components of the velocity in m/s). The two objects collide and
stick together. Find the x and y components of their common final
velocity and enter the magnitude (length) of the final velocity in
m/s into the answer box.

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 j . After the
collision, the two skaters move together at a common velocity. Use
conservation of momentum to find their final speed.
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

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?

EXAMPLE 6.4A Truck Versus a Compact
GOAL Apply conservation of momentum to a one-dimensional inelastic
collision.
PROBLEM A pickup truck with mass 1.80 103 kg is traveling eastbound
at +15.0 m/s, while a compact car with mass 9.00 102 kg is
traveling westbound at −15.0 m/s. (See figure.) The vehicles
collide head-on, becoming entangled. (a) Find the speed
of the entangled vehicles after the collision.
(b) Find the change in the velocity of each
vehicle. (c) Find the change in...

Mass A (3 kg) and Mass B (1 kg) collide head‐on on a
frictionless surface. A was initially moving to
the
right at 0.2 m/s, while B was moving at 0.4 m/s to the
left. The collision is completely elastic.
a) Find the velocity (magnitude and direction) for each mass after
the collision. Treat this as a one
dimensional problem.
b) Find the change in momentum for each
mass. Compare.
c) Find the change in kinetic energy for each
mass. Compare.

Two cars collide at an icy intersection and stick together
afterward. The first car has a mass of 1100 kg and is approaching
at 9.5 m/s due south. The second car has a mass of 950 kg and is
approaching at 15 m/s due west.
Part (a) Calculate the magnitude of the final
velocity, in meters per second, of the cars.
Part (b) Calculate the direction of the final
velocity, in degrees south of west, of the cars.
Part (c)...

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 cars collide at an icy intersection and stick together
afterward. The first car has a mass of 1350 kg and is approaching
at 9.5 m/s due south. The second car has a mass of 750 kg and is
approaching at 17.5 m/s due west.
Part (a) Calculate the magnitude of the final
velocity, in meters per second, of the cars.
Part (b) Calculate the direction of the final
velocity, in degrees south of west, of the cars.
Part (c)...

Two low-friction physics demo carts collide on a horizontal
track. The first cart, with a mass of 0.150 kg , is moving to the
right with a speed of 0.800 m/s . The second cart, with a mass of
0.298 kg , is moving to the left with a speed of 2.27 m/s . The
carts collide in an elastic collision, such that the total klinetic
energy after the collsion is equal to the total kinetic energy
before the collision....

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