Question

Speed of truck is 40 m/s, after 10 second its
speed decreases to 20 m/s. its acceleration


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Answer 1

Explanation:

a = (v1-v2)/t

= (40-20)/10

=20/10

a = 2 m/s²

Answer 2

Explanation:

Initial speed (u) =40m/s

Final speed (V) =20m/s

Time Taken(t) = 10 sec

To find : Acceleration (a) =?

As we know that

V = u +at

20 = 40 + a× 10

a×10 = 40- 20

a =20/10

a = 2 m/s^2