Mathematics 9709/42 — February/March 2021

Cambridge A-Level · Mechanics · worked solutions for every part, with the mark scheme

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marks

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Topics Newton's Laws of Motion · Forces and Equilibrium · Kinematics of Motion in a Straight Line · Energy, Work and Power · Momentum

Q13MMomentumFree sample

Two particles $P$ and $Q$ of masses $0.2\text{ kg}$ and $0.3\text{ kg}$ respectively are free to move in a horizontal straight line on a smooth horizontal plane. $P$ is projected towards $Q$ with speed $0.5\text{ m s}^{-1}$ . At the same instant $Q$ is projected towards $P$ with speed $1\text{ m s}^{-1}$ . $Q$ comes to rest in the resulting collision.

Find the speed of $P$ after the collision.

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6 more questions

Q2Energy, Work and Power · Forces and Equilibrium · Newton's Laws of Motion6M
Q3Forces and Equilibrium5M
Q4Kinematics of Motion in a Straight Line · Newton's Laws of Motion6M
Q5Kinematics of Motion in a Straight Line · Newton's Laws of Motion · Forces and Equilibrium9M
Q6Kinematics of Motion in a Straight Line11M
Q7Newton's Laws of Motion · Energy, Work and Power10M

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