Question

A body has an average speed up 30 m/s
if its final speed 40m/s, did the body
start from restor motion If it
started from motion. what was its Initial speed

​

Answer 1

Answer:

Initial velocity u=30

i

^

Final velocity v=40

j

^

Change in velocity Δv=40

j

^

−30

i

^

Magnitude ∣Δv∣=

30

2

+40

2

=50

Average acceleration a=

Δt

∣Δv∣

=

10

50

=5 m/s

2

Explanation:

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