(a)[3]
Describe how the bus’s motion from $t = 0$ to $t = 10\,\text{s}$ is different from its motion from $t = 35\,\text{s}$ to $t = 40\,\text{s}$.
(b(i))[3]
Determine the maximum speed of the bus during these 60 s.
(b(ii))[2]
Determine the average speed of the bus from leaving the first bus-stop until reaching the second bus-stop.
(c(i))[1]
State in what way velocity is different from speed.
(c(ii))[4]
There are three periods during the 60 s when the resultant force on the bus is not zero. Complete the statements to show these three time periods and state the direction of the resultant force for each one.
(d(i))[1]
State why the air resistance varies during the journey.
(d(ii))[1]
On Fig. 7.1, place and label with an M a time at which the air resistance is at its maximum.