Question

a bus decreases its speed from 80 kilometre per hour to 60 km per hour in 5 second find its acceleration​

Answer 1

✬ Acceleration = –1.1 m/s ✬

Given:

• Initial velocity (u) is 80 km/h.
• Final velocity (v) is 60 km/h.
• Time (t) is 5 seconds.

To Find:

• What is the acceleration (a) of the bus ?

Formula to be used:

• a = v – u/t

Solution: First we need to change the km/h into m/s.

• u = 80 x 5/18 = 22.22 m/s
• v = 60 x 5/18 = 16.7 m/s

$\implies{\rm }$ a = 16.7 – 22.22/5

$\implies{\rm }$ a = –5.5/5

$\implies{\rm }$ a = –1.1 m/s²

Hence, the acceleration of the bus is –1.1 m/s².

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★ Important terms ★

→ Acceleration (a) is the rate of change of velocity in a particular interval of time.

Answer 2

Answer:

Motion. A bus decreases its speed from 80 km/h to 60 km/h in 5 seconds. Find the acceleration of the bus. So, the bus is decelerating at a rate of -1.11 m/s^2..