Question

1. On a frictionless horizontal air table, puck A (with mass 0.252 kgkg ) is moving toward puck B (with mass 0.375 kgkg ), which is initially at rest. After the collision, puck A has velocity 0.122 m/sm/s to the left, and puck B has velocity 0.651 m/sm/s to the right.

Calculate ΔKΔKDeltaK, the change in the total kinetic energy of the system that occurs during the collision.

2. A 2.5 kgkg block of wood sits on a frictionless table. A 3.0 gg bullet, fired horizontally at a speed of 390 m/sm/s , goes completely through the block, emerging at a speed of 220 m/sm/s .

What is the speed of the block immediately after the bullet exits?

Answer #1

On a frictionless horizontal air table, puck A (with mass 0.252
kg ) is moving toward puck B (with mass 0.368 kg), which is
initially at rest. After the collision, puck A has velocity 0.121
m/s to the left, and puck B has velocity 0.651 m/s to the
right.
What was the speed vAi of puck A before the
collision?
= 0.830 m/s
Calculate ?K, the change in total kinetic energy of
the system that occurs in the collision.
= ?

Ethan, whose mass is 80
kgkg,
stands at one end of a very long, stationary wheeled cart that has
a mass of 260
kgkg.
He then starts sprinting toward the other end of the cart. He soon
reaches his top speed of 8.0
m/sm/s,
measured relative to the cart.
What is
the cart’s speed when Ethan reaches top speed?
A
2.0
kgkg
block
of wood sits on a frictionless table. A 3.0
gg
bullet,
fired horizontally at a speed of...

On a frictionless horizontal air table, puck A (with mass 0.255
kg ) is moving toward puck B (with mass 0.375 kg ), which is
initially at rest. After the collision, puck A has velocity 0.121
m/s to the left, and puck B has velocity 0.653 m/s to the
right.
a) What was the speed vAi of puck A before the collision?
b) Calculate ΔK, the change in the total kinetic energy of the
system that occurs during the collision.

On a frictionless, horizontal air table, puck A (with mass 0.250
kg ) is moving toward puck B (with mass 0.400 kg )
A -After the collision, puck A has a velocity of 0.150 m/s to
the left, and puck B has velocity 0.750 m/s to the right. What was
the speed of puck A before the collision?
B- If the two pucks collide and stick together with a final
velocity of 0.6000 m/s to the right, what was the...

On a frictionless horizontal air table, puck A (with mass 0.246
kg ) is moving toward puck B (with mass 0.372 kg ), which is
initially at rest. After the collision, puck A has velocity 0.121
m/s to the left, and puck B has velocity 0.653 m/s to the
right.
Part A
What was the speed vAi of puck A before the
collision?
View Available Hint(s)
vAi =
1.111.11
m/s
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Note that...

A 0.154 kgkg glider is moving to the right on a frictionless,
horizontal air track with a speed of 0.870 m/sm/s . It has a
head-on collision with a 0.295 kgkg glider that is moving to the
left with a speed of 2.22 m/sm/s . Suppose the collision is
elastic.
Find the magnitude of the final velocity of the 0.154 kgkg
glider.
Find the magnitude of the final velocity of the 0.295 kgkg
glider.

A 0.140 kgkg glider is moving to the right on a frictionless,
horizontal air track with a speed of 0.900 m/sm/s . It has a
head-on collision with a 0.301 kgkg glider that is moving to the
left with a speed of 2.20 m/sm/s . Suppose the collision is
elastic.
a)Find the magnitude of the final velocity of the 0.140 kgkg
glider.
b)Find the direction of the final velocity of the 0.140 kgkg
glider.
to the right
to the left...

A small, 200 gg cart is moving at 1.90 m/sm/s on a frictionless
track when it collides with a larger, 5.00 kgkg cart at rest. After
the collision, the small cart recoils at 0.810 m/sm/s .
What is the speed of the large cart after the collision?
Express your answer with the appropriate units.
A 2.2 kgkg block slides along a frictionless surface at 1.4
m/sm/s . A second block, sliding at a faster 4.4 m/sm/s , collides
with the...

A thin block of soft wood with a mass of 0.0800 kg rests on a
horizontal frictionless surface. A bullet with a mass of 4.67 g is
fired with a speed of 564 m/s at a block of wood and passes
completely through it. The speed of the block is 16.0 m/s
immediately after the bullet exits the block.
(a) Determine the speed of the bullet as it exits the
block.
__ m/s
(b) Verify by calculating the initial and...

A block of mass M = 5.80 kg, at rest on a horizontal
frictionless table, is attached to a rigid support by a spring of
constant k = 6250 N/m. A bullet of mass m = 8.30 g and velocity of
magnitude 570 m/s strikes and is embedded in the block (the
figure). Assuming the compression of the spring is negligible until
the bullet is embedded, determine (a) the speed of the block
immediately after the collision and (b) the...

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