Question

A person moves a distance of 40 km towards cast, then 30 km towards north Find
(1) the distance covered by the person, m

(i) the displacement of this motion
(b) Define average speed. An object moves with a uniform speed of 10m/s for 5 secs and then what uniform speed of Sm/s for 10 secs. Find its average 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