MDCAT Physics MCQs

Percentage uncertainty is absolute uncertainty divided by measured value times 100.
0.2/10.0×100 = 2%.

Inertia is related to mass.
Greater mass means greater resistance to acceleration.

Percentage error is |48-50|/50×100.
The result is 2/50×100 = 4%.

Move the decimal four places to the right to obtain 7.2.
Therefore the exponent is -4.

Use the Pythagorean theorem for perpendicular components.
Magnitude = √(3²+4²)=5.

The x-component is A cosθ.
10 cos60° = 10×0.5 = 5.

The y-component is A sinθ.
10 sin30° = 10×0.5 = 5.

Vectors in the same direction add directly.
The resultant is 12+7 = 19 N.

Opposite collinear vectors subtract in magnitude.
The resultant magnitude is |12-7| = 5 N.

Displacement is a vector from initial to final position.
It can be zero even when distance traveled is not zero.

Distance is a scalar and depends on the actual path.
It is always nonnegative.

Average speed uses total path length.
It does not depend on direction.