Question 1

Which of the following best describes the scientific method as outlined in the study materials?

Accepted Answer

A systematic approach involving observations, hypotheses, predictions, and experiments.

Question 2

A hypothesis in science must be falsifiable. What does 'falsifiable' mean in this context?

Accepted Answer

It can be tested and potentially shown to be incorrect by new experiments or observations.

Question 3

If all lengths in the universe were instantaneously doubled, what would happen to the measurement of lengths?

Accepted Answer

Measurements would not change because measurement is a ratio to a standard.

Question 4

Which of the following is NOT a requirement for a good standard of measurement?

Accepted Answer

It must change with time to reflect new discoveries.

Question 5

Which of the following is a vector quantity?

Accepted Answer

Velocity

Question 6

A car moves 30 m/s to the right. What physical quantity does this describe?

Accepted Answer

Velocity

Question 7

Which equation correctly gives the magnitude of the resultant $$R$$ when two vectors $$A$$ and $$B$$ are perpendicular?

Accepted Answer

$$R = \sqrt{A^2$ + B^2$}$$

Question 8

Which of the following is a scalar quantity?

Accepted Answer

Mass

Question 9

When adding two vectors graphically using the 'tip-to-tail' method, what does the resultant vector represent?

Accepted Answer

The sum of the two vectors in both magnitude and direction.

Question 10

Which of the following statements about scientific laws and theories is correct?

Accepted Answer

A scientific law is a well-tested hypothesis that has not been contradicted.

Question 11

Which of the following is NOT part of the International System of Units (SI)?

Accepted Answer

Pound

Question 12

A student adds a 5 kg mass and a 10 kg mass. What is the total mass?

Accepted Answer

15 kg

Question 13

Which of the following best describes the difference between speed and velocity?

Accepted Answer

Velocity includes direction, speed does not.

Question 14

If two forces of equal magnitude act in opposite directions on an object, what is the resultant force?

Accepted Answer

Zero

Question 15

Which of the following is the correct definition of measurement in physics?

Accepted Answer

The process of comparing a physical quantity to a standard unit.

Question 16

A vector is represented by an arrow. What does the length of the arrow indicate?

Accepted Answer

The magnitude of the vector.

Question 17

Which of the following is an example of a physical quantity that requires both magnitude and direction for its complete description?

Accepted Answer

Acceleration

Question 18

A student uses the parallelogram law to add two vectors $$\vec{A}$$ and $$\vec{B}. $$What does the diagonal of the parallelogram represent?

Accepted Answer

The resultant vector $$\vec{R}.$$

Question 19

Which of the following is NOT a vector quantity?

Accepted Answer

Speed

Question 20

A force of 30 N acts south and another force of 40 N acts east on an object. What is the magnitude of the resultant force?

Accepted Answer

$$\sqrt{30^2$ + 40^2$} = 50\ \mathrm{N}$$

module 1 lecture 2 : Foundations, Scientific Method, Measurement, and Vectors

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