Physics PreTest

What is the importance of using SI units in scientific measurements?

• They are easier to understand than English units

• They provide a universal standard for communication

• They are more accurate than any other system

• They only apply in physics experiments

Identify the scientific method step that involves making a testable prediction.

• Observation

• Hypothesis

• Experiment

• Conclusion

Which instrument measures electric current?

• Voltmeter

• Multimeter

• Thermometer

• Stopwatch

Which statement best describes the difference between accuracy and precision?

• Accuracy is closeness to the true value; precision is repeatability

• Precision is closeness to the true value; accuracy is repeatability

• Both measure closeness to the true value

• Accuracy measures the range of results

A student records lengths as 12.5 cm, 12.6 cm, and 12.5 cm. What does this suggest?

• Measurements are accurate but not precise

• Measurements are precise but not necessarily accurate

• Measurements are neither precise nor accurate

• Measurements are accurate and precise

Which statement describes displacement?

• Total distance traveled

• Change in position from start to finish

• Average speed

• Rate of change in velocity

A car travels 100 m east then 50 m west. What is the displacement?

• 50 m west

• 50 m east

• 150 m east

• 150 m west

On a position vs. time graph, the slope represents:

• Acceleration

• Velocity

• Force

• Momentum

An object moves 60 m in 6 s. What is its velocity?

• 360 m/s

• 10 m/s

• 0.1 m/s

• 6 m/s

Tags

NGSS.MS-PS3-1

Newton’s Second Law of Motion can be expressed as:

• F = ma

• a = mF

• F = m/v

• p = mv

Tags

NGSS.HS-PS2-1