A car has a velocity $\to v = 80 k m / h r$ towards east. Another car on the road has a velocity = . $\to - v$ The speed and the direction of vecthe second car is

a) 80 km/hr towards south

b) 80 km/hr towards west

c) Direction cannot be determined from the given information

d) Speed of the second car cannot be determined from the given information.

80 km/hr towards south

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80 km/hr towards west

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Direction cannot be determined from the given information

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Speed of the second car cannot be determined from the given information.

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Solution

The correct option is B 80 km/hr towards west
We know that negative of a vector has the same magnitude but the opposite direction. So the second car having velocity $\to - v$ will have same speed (magnitude) as that of first car which is 80 km/hr, but the direction will be opposite. So the direction of the second car will be towards west, opposite to that of first car.

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