Fundamentals of Physics Chapter 1

What is the definition of a physical quantity?

• A physical quantity is a property that cannot be quantified.

• A physical quantity is a type of mathematical equation.

• A physical quantity is an abstract concept without measurement.

• A physical quantity is a measurable property of a physical system.

Explain the difference between scalar and vector quantities.

• Both scalar and vector quantities have no magnitude or direction.

• Scalar quantities have direction, while vector quantities have only magnitude.

• Scalar quantities have only magnitude, while vector quantities have both magnitude and direction.

• Scalar quantities can be represented as arrows, while vector quantities cannot.

What are the fundamental units in the SI system?

• foot, ounce, minute

• yard, pound, day

• liter, gram, hour

• meter, kilogram, second, ampere, kelvin, mole, candela

How do you convert units from one system to another?

• Divide the value by the conversion factor.

• Multiply the value by the conversion factor.

• Add the value to the conversion factor.

• Subtract the conversion factor from the value.

What is the significance of significant figures in measurements?

• Significant figures are only important in scientific research.

• Significant figures are used to determine the color of a measurement.

• Significant figures are irrelevant in everyday measurements.

• Significant figures are important because they convey the precision of measurements and ensure accurate communication of data.

Describe the concept of dimensional analysis.

• Dimensional analysis focuses solely on the numerical values of measurements.

• Dimensional analysis is a method for converting units and verifying the consistency of equations by analyzing the dimensions of physical quantities.

• Dimensional analysis is used to create new physical laws without any calculations.

• Dimensional analysis is a technique for measuring temperature variations.

What is the difference between accuracy and precision?

• Accuracy measures the average; precision measures the range.

• Accuracy and precision are the same concept.

• Accuracy is about correctness; precision is about consistency.

• Accuracy is about speed; precision is about detail.

How do you calculate the average speed of an object?

• Average Speed = Distance x Time

• Average Speed = Total Time / Total Distance

• Average Speed = Total Distance / Total Time

• Average Speed = Total Distance + Total Time

What is the role of a reference point in motion?

• A reference point is used to calculate the speed of light.

• The role of a reference point in motion is to provide a basis for measuring and describing the position and movement of an object.

• A reference point is irrelevant to the movement of objects.

• A reference point determines the color of an object in motion.

Explain the concept of displacement versus distance.

• Displacement measures the time taken to travel; distance measures the speed of travel.

• Distance is the shortest path between two points; displacement is the total distance traveled.

• Distance is a vector quantity; displacement is a scalar quantity.

• Distance is the total path length traveled; displacement is the straight-line distance from start to end.