Correct your friend who says, “ The car rounded the curve at a constant velocity of 70 km/h”.
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The car rounded the curve at a constant speed of 70 km/hr
The velocity being a vector has a direction attached to it. And in a circular motion the direction of motion keeps on changing ( and so does the direction of velocity), so velocity(magnitude + direction) can't be constant. Although the magnitude (speed) may remain constant
The velocity being a vector has a direction attached to it. And in a circular motion the direction of motion keeps on changing ( and so does the direction of velocity), so velocity(magnitude + direction) can't be constant. Although the magnitude (speed) may remain constant
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Answer:
The correct statement is, "The car rounded the curve at a constant speed of 70 km/hr."
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