College Physics
10th Edition
ISBN: 9781285737027
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Chapter 6, Problem 42P
A 1200-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9 000-kg truck moving in the same direction at 20.0 m/s (Fig. P6.44). 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? (b) How much mechanical energy is lost in the collision? Account for this loss in energy.
Figure P6.44
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A 1200-kg car traveling initially with a speed of 25.0 m/s in
an easterly direction crashes into the rear end of a 9 000-kg
truck moving in the same direction at 20.0 m/s (Fig. P6.44).
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? (b) How much mechanical energy is lost in the colli-
sion? Account for this loss in energy.
+20.0 m/s
+25.0 m/s
+18.0 m/s
Before
After
Figure P6.44
A 1 200-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9 000-kg truck moving in the same direction at 20.0 m/s (Fig. P6.42). 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? (b) How much mechanical energy is lost in the collision? Account for this loss in energy.
A 2.0-kg object moves to the right with a speed of 4.0 m/s. It collides in a perfectly elastic head-on collision with a 5.0-kg object at rest. (a) What is the total kinetic energy after the collision? (b) What is the speed of the 2.0-kg object after the collision? (c) What is the speed of the 5.0-kg object after the collision?
Chapter 6 Solutions
College Physics
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