(a)[3]
From Fig. 1.1, determine the resultant force on the car over the initial 1.5 s of its motion.
(b(i))[2]
The car has mass m. If the car’s momentum is p, its kinetic energy is $E_k$. Show that $\frac{p^2}{2m}=E_k$.
(b(ii))[3]
At $t=6.0\,\text{s}$, the car’s kinetic energy is $5.4\times10^5\,\text{J}$. From Fig. 1.1, determine the momentum p of the car at $t=6.0\,\text{s}$, then use the equation in (b)(i) to determine the mass m of the car. Show your working.