The table below gives the momentum of a 1kg cart at different times.
Time t (s): 0, 2, 4, 6
Momentum p (kg·m·s−1): 0, 10, 10, 4
(a) Plot a rough momentum–time graph for the cart using the data above.
(b) For each of the three time intervals 0–2 s, 2–4 s and 4–6 s, calculate the magnitude and direction of the net force acting on the cart.
(c) During which interval is the greatest magnitude of force acting? Justify your answer using the values obtained.
(d) Find the average force acting on the cart over the entire 6 s duration.