Question

1-The velocity of a bus changes from 36 km/h to 20 km/h .Then the change in acceleration is

Answer 1

Answer:

Acceleration is the rate of change in the velocity of a moving body. In formula form acceleration = Δvelocity / Δtime. Δvelocity = (60 km/h - 36 km/h) = 24 km/h. Δtime = 5 seconds. Dividing 24km/h by 5 s gives a quotient of 4.8 km/h/s. Since the quotient has a non-standard unit of acceleration, it can still be converted to the standard unit of m/s^2.

Converting 4.8 km/h/s to m/s^2

4.8 km/h/s = ? m/s^2

4800 m/3600s/s = ? m/s^2

4800/3600 m/s/s = ? m/s^2

1.333 m/s/s = ? m/s^2

1.333 m/s^2 = 1.333 m/s2

The acceleration of the bus is 4/3 m/s^2 or 1.33 m/s^2

Explanation: