Fig. 2.1 shows a 2.0 kg object resting on a bench. A cord, which runs over a pulley, links this object to a 3.0 kg object.
Once released from rest, the 2.0 kg object accelerates at 4.0 m/s$^2$.
(a)[2]
Calculate the resultant force on the 2.0 kg object.
(b)[3]
Calculate the upward force $F$ applied by the cord to the 3.0 kg object.
(c(i))[2]
Show that the speed of the objects 0.80 s after release is 3.2 m/s.
(c(ii))[2]
Using the speed from c(i), calculate how long the card takes to pass through the beam of light.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The force is F = 8.0 N.” …