(a)[2]
Explain how distance and displacement differ.
(b)[1]
State Newton’s first law of motion.
(c)
As shown in Fig. 1.1, two tugs draw a tanker at constant velocity in the direction XY. Tug 1 exerts a force $T_1$ at $25.0^{\circ}$ to XY. Tug 2 exerts a force $T_2$ at $15.0^{\circ}$ to XY. The resultant force $R$ from the two tugs is $25.0 \times 10^3\text{ N}$ in the direction XY.
(c(i))[2]
Using the forces acting on the tanker, explain why the tanker can be described as being in equilibrium.
(c(ii).1)[2]
Complete Fig. 1.2 by drawing a vector triangle for the forces $R$, $T_1$ and $T_2$.
(c(ii).2)[2]
Use your vector triangle in Fig. 1.2 to determine the magnitude of $T_1$ and of $T_2$.