A car is going towards north with a velocity 20 metre per second full stop after some time it starts to go towards south with velocity 20 metre per second full stop determine changes in the velocity of the car full stop
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Answer:
zero because dispalcement is zero
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Answer:- i40m/s
Explanation:
The change in velocit of the car is = 40 m/sec
Welcome to the Vector mechanics, Velocity is a vector quantity which depends both on magnitude and the direction.
In the above scenario, the magnitude remained the same but the direction changed by 180 degrees...
v1 = 20 m/sec
v2 = 20m/sec cos a(angle between the two vectors) = -20
dv = v2-v1
= (-20) - (20)
= -40 m/sec
The negative sign indicates that the car is moving in the opposite direction relative to the initial direction
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