Question

A 1 150.0 kg car traveling initially with a speed of 25.000 m/s in an easterly direction crashes into the back of a 8 000.0 kg truck moving in the same direction at 20.000 m/s. The velocity of the car right after the collision is 18.000 m/s to the east.

(a) What is the velocity of the truck right after the collision?
(Give your answer to five significant figures.) m/s east

(b) What is the change in mechanical energy of the car–truck system
in the collision? J

(c) Account for this change in mechanical energy.

Answer #1

Conversation of linear momentum

A 1,270-kg car traveling initially with a speed of 25.0 m/s in
an easterly direction crashes into the rear end of a 8,600-kg truck
moving in the same direction at 20.0 m/s (see figure below). The
velocity of the car right after the collision is 18.0 m/s to the
east.
(a) What is the velocity of the truck right after the
collision?
m/s (east)
(b) How much mechanical energy is lost in the collision?
J
Account for this loss in...

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A 1060 - kg car moving at 8.80 m/s is
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+
In unit-vector notation, what is the impulse on the car during
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A 1000-kg car approaches an intersection traveling north at 20.0
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A car of equal mass approaches the same intersection traveling
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A car of mass m1 = 2000.0 kg is moving at speed v1i = 20.0m/s
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