A car moves along north with speed of 50 m/s then it takes a right turn and moves with 50 m/s along south. Find change in speed and change in velocity.
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Answer:
Initial velocity = v
i
=50j
FInal velocity =v
f
=−50i
Change in velocity = Δv=v
f
−v
i
=−50i−50j
Negative x- means west direction and negative y-component means south direction. Hence resultant velocity is in south-west direction.
Magnitude of change in velocity =
(−50
2
)+(−50
2
))
= 70. 71 km/h
Explanation:
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