Question

The velocity of an object moving in a straight line 2
changes from 20 m/s to 144 km/h in 10 s. Average
acceleration of the object in this time interval is
(1) 12.4 m/s2
(2) 16.4 m/s2
(3) 2 m/s2
(4) 10.2 m/s2​

Answer 1

2. 16.4m/s2

this is your answer.....

Answer 2

Explanation:

Initial velocity, u = 20m/s

Final velocity, v = 144 km/h

= (144 × 5/18)m/s

= 40m/s

Time, t = 10s

Acceleration, a

= Change in velocity/Time

a = (v - u)/t

a = (40 - 20) / 10

a = 20/10

a = 2 m/s²

Average acceleration = 2 m/s²

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