Two smooth disks $A$ and $B$ have the initial velocities shown just before they collide. If they have masses $m_{A}=4 \mathrm{kg}$ and $m_{B}=2 \mathrm{kg},$ determine their speeds just after impact. The coefficient of restitution is $e=0.8$
Added by Rachel H.
Step 1
Before collision: $m_A \cdot v_{A1} + m_B \cdot v_{B1} = m_A \cdot v_{A2} + m_B \cdot v_{B2}$ After collision: $m_A \cdot v_{A2} + m_B \cdot v_{B2} = m_A \cdot v_{A2} + m_B \cdot v_{B2}$ Show more…
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Question S: Two disks A and B each have a mass of 1 kg and the initial velocities shown just before they collide. If the coefficient of restitution is e = 0.5, determine their speeds just after impact. (vA) = 4 m/s (vB) = 3 m/s
Sri K.
The two disks $A$ and $B$ have a mass of $3 \mathrm{kg}$ and $5 \mathrm{kg}$ respectively. If they collide with the initial velocities shown, determine their velocities just after impact. The coefficient of restitution is $e=0.65$.
(II) Two billiard balls of equal mass move at right angles and meet at the origin of an $x y$ coordinate system. Initially ball $A$ is moving along the $y$ axis at $+2.0 \mathrm{m} / \mathrm{s},$ and ball $\mathrm{B}$ is moving to the right along the $x$ axis with speed $+3.7 \mathrm{m} / \mathrm{s}$ . After the collision (assumed elastic), the second ball is moving along the positive $y$ axis (Fig. $43 ) .$ What is the final direction of ball $A,$ and what are the speeds of the two balls?
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