Physics · Oct / Nov 2021 · Paper 42 · Question 3
0625
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The question as text
Fig. 3.1 shows a collision at very slow speed between two cars travelling along a straight road. car B car A Fig. 3.1 Car B, of mass 800 kg, is moving at 2.0 m / s and collides with car A, of mass 1000 kg, which is stationary. After the collision, both cars travel in the same direction as the initial direction of car B.
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3(a)[3]
momentum before collision = momentum after collision
(initial momentum (p) =) 800 × 2 OR 1600 (kg m / s)
(v =) (1600 – 1300) / 800 OR 300 / 800 OR 0.38 (m / s)
3(b)(i)[2]
(impulse =) change in momentum
1300 Ns
3(b)(ii)[1]
same value as (b)(i) OR 1300 (Ns)
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