In Figure, block A (mass 0.8 kg) slides into block B (mass 1.2 kg), along a frictionless surface.The directions of three velocities before (i) and after (f) the collision are indicated in the figure; the corresponding speeds are vAI=1.9 m/s, VBi 4.9 m/s, and vBr 2.5 m/s.What are the (a) magnitude and (b) direction (left or right) of velocity VAr? (c) Calculate the total kinetic energy of the system before and after the collision. Is the collision elastic?

Question
In Figure, block A (mass 0.8 kg) slides into
block B (mass 1.2 kg), along a frictionless surface.The
directions of three velocities before (i) and after (f) the
collision are indicated in the figure; the corresponding
speeds are vAI=1.9 m/s, VBi 4.9 m/s, and vBr 2.5
m/s.What are the (a) magnitude and (b) direction (left or
right) of velocity VAr? (c) Calculate the total kinetic
energy of the system before and after the collision. Is the
collision elastic?
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Transcribed Image Text

In Figure, block A (mass 0.8 kg) slides into block B (mass 1.2 kg), along a frictionless surface.The directions of three velocities before (i) and after (f) the collision are indicated in the figure; the corresponding speeds are vAI=1.9 m/s, VBi 4.9 m/s, and vBr 2.5 m/s.What are the (a) magnitude and (b) direction (left or right) of velocity VAr? (c) Calculate the total kinetic energy of the system before and after the collision. Is the collision elastic?

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