Question

A bus travels north on some busy city streets for 2.5 km, and a trip

that takes 9 minutes. At one point in the trip, the bus is stopped
at a red light. What is its instantaneous velocity in m/s? At another
point, the bus travels at a constant speed of 18 m/s. What is its
instantaneous velocity?

Answer 1

V = 4.63 m/s

V = 11.31 m/s

Step-by-step explanation:

Given,

The distance traveled by the bus, towards north, d = 2.5 km

= 2500 m

The time taken by the trip is, t = 9 min

= 540 s

The velocity of the bus,

V = d / t

= 2500 / 540

= 4.63 m/s

At another point, the bus travels at a constant speed of v = 18 m/s

Therefore the velocity becomes

V = (4.63 + 18)/2

= 11.31 m/s

Hence, the velocity of the bus, V = 11.31 m/s