PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A student walks along a straight road at 4kmh−1 for 30min, rests for 15min, and then rides a bicycle in the same direction along the same road at 12kmh−1 for 45min. The road may be treated as a straight line.
(a) Calculate the distance covered during each moving stage.
(b) Find the total distance travelled by the student.
(c) Determine the total time elapsed from the start of the walk to the end of the bicycle ride, including the rest period.
(d) Compute the average speed for the entire trip.