Physics

Problem

A bus travels along a straight road in three successive stages of motion. a. (a) First, it accelerates uniformly from

15\,\text{m/s}

25\,\text{m/s}

in a time interval

t_1

. Next, it maintains the speed of

25\,\text{m/s}

for

60\,\text{s}

. Finally, it comes to rest with uniform retardation in the same time interval

t_1

as in the acceleration phase. The total distance covered in the entire journey is

2000\,\text{m}

. Calculate the value of

t_1

. b. (b) Determine the magnitude of the acceleration of the bus during the first stage. c. (c) Find the total time taken for the complete journey described above.

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