Practice ECAT Physics questions with answers and explanations.
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In ideal free fall, air resistance is neglected.
All objects then have the same gravitational acceleration locally.
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Average speed equals distance divided by time.
120/10 = 12 m/s.
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Slope gives change in velocity per unit time.
That is acceleration.
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Displacement is 14-2 = 12 m.
Average velocity is 12/4 = 3 m/s.
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Integrating velocity over time gives displacement.
Areas below the time axis count as negative displacement.
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Average speed uses total distance.
400/80 = 5 m/s.
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Use the Pythagorean theorem for perpendicular components.
Magnitude = √(3²+4²)=5.
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The x-component is A cosθ.
10 cos60° = 10×0.5 = 5.
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The y-component is A sinθ.
10 sin30° = 10×0.5 = 5.
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Vectors in the same direction add directly.
The resultant is 12+7 = 19 N.
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Opposite collinear vectors subtract in magnitude.
The resultant magnitude is |12-7| = 5 N.
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Displacement is a vector from initial to final position.
It can be zero even when distance traveled is not zero.
