Fig. 1.1 depicts an archer shooting an arrow at a target in a competition.
The arrow's mass is 0.018 kg and it starts from rest. It leaves the bow 0.011 s after the bow string is released. At the moment it leaves the bow, its velocity is 95 m/s.
(a(i))[2]
Calculate the average acceleration of the arrow over the 0.011 s interval.
(a(ii))[2]
Calculate the average force acting on the arrow during the 0.011 s.
(b)[2]
In reality, the force on the arrow falls steadily to zero while it is being fired. On Fig. 1.2, sketch a possible speed-time graph for the arrow as it is being fired.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Using $a=\Delta v / t$, we get $a = 95 / 0.011$.” …