(a(i))[1]
Explain what the term work done means.
(a(ii))[1]
Explain what the term kinetic energy means.
(b(i).1)[2]
For the carriage travelling from X to Y, show that the decrease in kinetic energy is $9.9 \times 10^4\,\text{J}$.
(b(i).2)[2]
Calculate the increase in gravitational potential energy.
(b(ii))[1]
Show that the length of the track from X to Y is $20\,\text{m}$.
(b(iii))[2]
Use your answers in (b)(i) and (b)(ii) to calculate the average resistive force acting on the carriage as it travels from X to Y.
(b(iv))[1]
Describe the change in direction of the linear momentum of the carriage as it moves from X to Y.
(b(v))[3]
Determine the magnitude of the change in linear momentum when the carriage travels from X to Y.