Jawapan

2015-09-19T11:08:01+08:00

Ini Jawapan Diperakui

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Jawapan diperakui mengandungi maklumat yang boleh dipercayai dan diharapkan yang dijamin dipilih dengan teliti oleh sepasukan pakar. Brainly mempunyai berjuta-juta jawapan berkualiti tinggi, semuanya disederhanakan dengan teliti oleh ahli komuniti kami yang paling dipercayai, tetapi jawapan diperakui adalah terbaik di kalangan terbaik.
During elastic collision:
Two objects collide and move apart after a collision. Both objects move in different velocities after a collision.
Formula:
 m_{1}  u_{1} + m_{2}  u_{2} = m_{1}  v_{1} + m_{2}  v_{2}
where m=mass, u=initial velocity and v=final velocity.
∴ Momentum is conserved. Total energy is conserved. Kinetic energy is conserved.
During inelastic collision:
Two objects combine and stop, or move together with a common velocity after a collision.
Formula:
 m_{1} u_{1} + m_{2} u_{2}  =v( m_{1} + m_{2})
where m=mass, u=initial velocity and v=final velocity.
∴ Momentum is conserved. Total energy is conserved. Kinetic energy is not conserved. (The total kinetic energy after the collision is less than the total kinetic energy before the collision.  \frac{1}{2}  m_{1} u_{1} ^{2} + \frac{1}{2} m_{2}u_{2}^{2}\ \textgreater \  \frac{1}{2}  v^{2} ( m_{1} + m_{2} ) )