Question

A 11600 kg railroad car is coasting on a level, frictionless track at a speed of 16.0 m/s when a 5420 kg load is dropped onto it. If the load is initially at rest, find the a) new speed of the car and b) % change of the kinetic energy.

Answer #1

Answer

A 14500 kg railroad car travels alone on a level frictionless
track with a constant speed of 21.0 m/s. A 6000 kg load, initially
at rest, is dropped onto the car. What will be the car's new
speed?

5. A railroad car travels alone on a level frictionless track
with a constant speed. A load, initially at rest, is
dropped onto the car. The final linear momentum of the car will be
a) the same as before. b) less than before. c) more than before. d)
zero.

a railroad freight car, mass 17000kg, is allowed to
coast along a level track at a speed of 3m/s . it collides and
couples with a 50,000 kg loaded second car, initially at rest and
with brakes released. what percentage of the initial kinetic energy
in the 17000 kg car is preserved in the two coupled cars after
collision?

Four railroad cars, each of mass 2.70 104 kg, are coupled
together and coasting along horizontal tracks at speed vi toward
the south. A very strong but foolish movie actor, riding on the
second car, uncouples the front car and gives it a big push,
increasing its speed to 3.85 m/s southward. The remaining three
cars continue moving south, now at 2.00 m/s.
(a) Find the initial speed of the four cars.
m/s
(b) By how much did the potential...

Block 1, of mass m1 = 12.3 kg , moves along a frictionless air
track with speed v1 = 13.0 m/s . It collides with block 2, of mass
m2 = 39.0 kg , which was initially at rest. The blocks stick
together after the collision. Find the magnitude pi of the total
initial momentum of the two-block system. Find vf, the magnitude of
the final velocity of the two-block system. What is the change
ΔK=Kfinal−Kinitial in the two-block system's...

Block 1, of mass m1 = 1.70 kg , moves along a frictionless air
track with speed v1 = 29.0 m/s . It collides with block 2, of mass
m2 = 59.0 kg , which was initially at rest. The blocks stick
together after the collision. (Figure 1)
Find the magnitude pi of the total initial momentum of
the two-block system.
Find vf, the magnitude of the final velocity of the
two-block system.
What is the change ΔK=Kfinal−Kinitial
in the...

a 7500 kg railroad car traveling at a speed of 26.0 m/s strikes
a 5000kg car traveling at 10.0m/s. If the cars lock together as a
result of collision what is their common speed afterward? How much
of the initial kinetic energy is transferred to other forms of
energy?
Answer in 3 decimal places, and include full equation please

Block 1, of mass m1 = 9.70 kg , moves along a frictionless air
track with speed v1 = 27.0 m/s . It collides with block 2, of mass
m2 = 55.0 kg , which was initially at rest. The blocks stick
together after the collision. (Figure 1)
Part A: Find the magnitude pi of the total initial momentum of
the two-block system.
Part B: Find vf, the magnitude of the final velocity of the
two-block system.
Part C: What...

A roller-coaster car may be represented by a block of mass 50.0
kg . The car is released from rest at a height h = 48.0 m above the
ground and slides along a frictionless track. The car encounters a
loop of radius R = 16.0 m at ground level, as shown. As you will
learn in the course of this problem, the initial height 48.0 m is
great enough so that the car never loses contact with the
track....

Block 1, of mass m1 = 5.30 kg , moves along a frictionless air
track with speed v1 = 31.0 m/s . It collides with block 2, of mass
m2 = 51.0 kg , which was initially at rest. The blocks stick
together after the collision.
A.Find the magnitude pi of the total initial momentum of the
two-block system.
B.Find vf, the magnitude of the final velocity of the two-block
system.
C. What is the change ΔK=Kfinal−Kinitial in the two-block...

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