Collisions (AQA GCSE Physics Combined Science): Flashcards

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Collisions
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Momentum after collision when both cars come to rest

0 kg m/s

Conservation principle in collisions

Momentum is conserved

Initial momentum if final momentum is 0 kg m/s

0 kg m/s

Momenta relation when total equals zero

Equal in magnitude

Equation for momentum

p=mvp = mv

Equation for equal momenta of two cars

mA×vA=mB×vBm_A \times v_A = m_B \times v_B

Rearranging for vAv_A from mA×vA=mB×vBm_A \times v_A = m_B \times v_B

vA=mB×vBmAv_A = \frac{m_B \times v_B}{m_A}

Calculate vAv_A: mAm_A=1000 kg, mBm_B=1500 kg, vBv_B=9 m/s, p=0

13.5 m/s

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