Question

1. A 8600kg boxcar is traveling at 12 m/s strikes a second boxcar of mass 7900 kg moving in the same direction. The two stick together and move off with a speed of 5.25 m/s. What was the original speed of the second boxcar? Explain your reasoning.

2. How much kinetic energy was lost in the collision?

Answer #1

A 2250 kg car traveling in the neagtive x direction at 8.5 m/s
strikes a second car of mass 2830 kg which is moving. The first
rebounds and moves off with a speed of 2.7 m/s. After the
collision, the second car moves in the negative x direction at 3.2
m/s. What was the original speed and direction of the second car?
Explain your reasoning.
Then how much kinetic energy was lost in the collision?

Question1) A car moving North at 12 m/s strikes a stationary car
of equal mass. The first car moves off after the collision at an
angle of 30° East of North with a speed of 8.0 m/s.
a. What is the velocity of the struck car just after
the collision?
b. Show that the collision is inelastic.
c. Explain how dents, skid marks, etc. show that
kinetic energy has been lost.
d. If the collision were perfectly elastic, what would...

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

A 10,000-kg railroad car A, traveling at a speed of 24.0 m/s
strikes an identical car, B, at rest. If the cars lock together and
move at the same speed 12.0 m/s as a result of the collision, how
much of the initial kinetic energy is transformed to thermal or
other forms of energy? Round your answer to0 decimal places
A marble column of diameter 1.54 m and area 1.86 m2
supports a mass of 59 600 kg.Calculate the strain,...

Ball A has a mass of 100 kg; it is traveling to the right at 6.2
m/s. Ball B has a mass of 120 kg; it is traveling to the left at
4.7 m/s.(a) Assume an inelastic collision (they stick together).
Determine velocity at which the two move off together. Give speed
and direction. Pay attention to the + and – signs.(b) Assume they
have a perfectly elastic collision. Determine the speeds and
directions of each of the balls.

An object of mass m1=6.1 kg moving at 5.1 m/s strikes a
stationary second object of unknown mass. After an elastic
collision, the first object is observed moving at 3.06 m/s at an
angle of -43° with respect to the original line of motion. What is
the energy of the second object?

A railroad car of mass 2.50 ✕ 104 kg moving at 3.40
m/s collides and couples with two coupled railroad cars, each of
the same mass as the single car and moving in the same direction at
1.20 m/s.
(a) What is the speed of the three coupled cars after the
collision?
(b) How much kinetic energy is lost in the collision?

A 2.0-N puck is traveling at 3.0 m/s. It strikes an 4.0-N puck,
which is moving at – 2.0 m/s before collision. The two pucks stick
together. Find their common final speed

A railroad car of mass 3.00 ? 104 kg moving at 3.00
m/s collides and couples with two coupled railroad cars, each of
the same mass as the single car and moving in the same direction at
1.20 m/s.
(a) What is the speed of the three coupled cars after the
collision?
_______ m/s
(b) How much kinetic energy is lost in the collision?
_______ J

A railroad car of mass 2.70 ✕ 104 kg moving at 3.50
m/s collides and couples with two coupled railroad cars, each of
the same mass as the single car and moving in the same direction at
1.20 m/s.
(a) What is the speed of the three coupled cars after the
collision?
m/s
(b) How much kinetic energy is lost in the collision?
J

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