In a car crash, a Volvo of mass 1.85 x 104 kg collides with a stationary truck of mass 2.20 x 104 kg at a speed of u = 20.0 ms-1. Filling the crash, they connect and move at the same speed. There is no friction.  1. Demonstrate how the speed of the cars after the collision is 9.14 ms-1. 2. If one of the car wheels is modelled as a disk with a radius of 4.60 x 10-1 m and moment of inertia 36.5 kg m2, what is the magnitude of the wheels angular momentum following the crash? 3. The cars linear velocity vector is in the positive x-direction. Using the Cartesian coordinate system what is the direction of the wheels angular momentum vector? Discuss your thoughts.

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Chapter1: Units, Trigonometry. And Vectors
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In a car crash, a Volvo of mass 1.85 x 10kg collides with a stationary truck of mass 2.20 x 104 kg at a speed of u = 20.0 ms-1. Filling the crash, they connect and move at the same speed. There is no friction. 

1. Demonstrate how the speed of the cars after the collision is 9.14 ms-1
2. If one of the car wheels is modelled as a disk with a radius of 4.60 x 10-1 m and moment of inertia 36.5 kg m2, what is the magnitude of the wheels angular momentum following the crash? 
3. The cars linear velocity vector is in the positive x-direction. Using the Cartesian coordinate system what is the direction of the wheels angular momentum vector? Discuss your thoughts. 

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