(a)[1]
Distinguish between scalars and vectors.
(b)[2]
Underline every vector quantity in the list below. acceleration, kinetic energy, momentum, power, weight
(c)[2]
A force of $7.5\,\text{N}$ acts at $40^{\circ}$ to the horizontal, as shown in Fig. 1.1. Calculate the component of the force that acts (i) horizontally, (ii) vertically.
(c(i))[1]
Calculate the horizontal component of the force.
(c(ii))[1]
Calculate the vertical component of the force.
(d)[4]
Two strings hold a load with weight $7.5\,\text{N}$, as shown in Fig. 1.2. One string has tension $T_1$ and makes an angle $50^\circ$ to the horizontal. The second string has tension $T_2$ and makes an angle $40^\circ$ to the horizontal. The object is in equilibrium. Find $T_1$ and $T_2$ by using a vector triangle or by resolving forces.