Physical Quantities and Units Quiz

Which of the following is a complete definition of a physical quantity?

• A numerical value only
• A unit of measurement only
• A numerical value combined with a unit of measurement
• A measurement without context

In the SI unit system, what is the fundamental unit for mass?

• Gram
• Pound
• Kilogram
• Milligram

Which prefix represents a multiplication factor of 10⁻³?

• Mega
• Kilo
• Milli
• Micro

Which of the following is an example of a scalar quantity?

• Velocity
• Force
• Displacement
• Temperature

What does vector resolution involve?

• Eliminating vector measurements
• Breaking vectors into horizontal and vertical components
• Combining multiple vectors
• Measuring vector magnitude only

The formula x = V cos θ is used for:

• Calculating total vector magnitude
• Resolving vector horizontal component
• Measuring vector direction
• Combining perpendicular vectors

Which method is used to add non-perpendicular vectors?

• Pythagoras' theorem
• Scale drawing
• Trigonometric calculation
• Direct addition

What does 'precision' in measurement uncertainty refer to?

• Closeness to true value
• Consistency of measurements
• Total measurement error
• Magnitude of measurement

Which strategy helps reduce random errors in measurements?

• Calibrating equipment
• Taking multiple measurements
• Using a single instrument
• Ignoring small variations

In the equation F = ma, what are the SI units of force?

• kg·m
• kg·m/s
• kg·m/s²
• kg/m·s