Practice USAT Physics questions with answers and explanations.
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A vector has both magnitude and direction.
Acceleration describes the rate and direction of velocity change.
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Both sides of a valid physical equation must have the same dimensions.
Dimensional analysis can reveal inconsistent formulas.
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The newton is derived from base units as kg·m/s².
Metre, kilogram, and second are base units.
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The metre is the SI base unit of length.
Other metric length units are derived from it using prefixes.
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The kilogram is the SI base unit of mass.
The gram is one-thousandth of a kilogram.
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The second is the SI base unit of time.
Minutes and hours are accepted non-SI units derived from it.
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A scalar has magnitude only.
Speed has no associated direction.
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Accuracy describes agreement with the true or accepted value.
Systematic error can reduce accuracy.
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The kilogram is the SI base unit of mass.
The gram is one-thousandth of a kilogram.
Choose an option to check your answer.
The second is the SI base unit of time.
Minutes and hours are accepted non-SI units derived from it.
Choose an option to check your answer.
A scalar has magnitude only.
Speed has no associated direction.
Choose an option to check your answer.
A vector has both magnitude and direction.
Acceleration describes the rate and direction of velocity change.
