Question 1

Which of the following statements best describes the difference between science and technology?

Accepted Answer

Science is concerned with gathering and organizing knowledge, while technology is the use of scientific knowledge for practical purposes.

Question 2

A car is moving at a constant velocity on a straight road. According to Newton's First Law, what can you conclude about the net force acting on the car?

Accepted Answer

The net force is zero.

Question 3

Which of the following is NOT a vector quantity?

Accepted Answer

Speed

Question 4

A box is pulled north with a force of 60 N and east with a force of 80 N. What is the magnitude of the resultant force?

Accepted Answer

$$\sqrt{60^2$ + 80^2$} = 100\ \mathrm{N}$$

Question 5

Which of the following is a scientific hypothesis?

Accepted Answer

All of the above are scientific hypotheses.

Question 6

A 10-kg block is simultaneously pushed eastward with a force of 20 N and westward with a force of 15 N. What is the net force acting on the block?

Accepted Answer

$$5\ \mathrm{N}$$ eastward

Question 7

Which of the following best describes the scientific method?

Accepted Answer

A systematic process involving observation, hypothesis, prediction, experimentation, and formulation of general rules.

Question 8

A book weighing 10 N is placed on a table. What is the magnitude of the support force exerted by the table on the book?

Accepted Answer

$$10\ \mathrm{N}$$

Question 9

Which of the following statements about scientific theories is correct?

Accepted Answer

A scientific theory is a vast synthesis of well-tested hypotheses and facts.

Question 10

A crate is pushed at a steady speed in a straight line across a floor. If the friction force is 75 N, how much force must you apply to keep it moving at constant speed?

Accepted Answer

$$75\ \mathrm{N}$$

Question 11

Which of the following is NOT a scientific hypothesis?

Accepted Answer

Undetectable particles are some of nature's secrets.

Question 12

A car travels at $$90\ \mathrm{km/hr}. $$What is its speed in $$\mathrm{m/s}$$?

Accepted Answer

$$25\ \mathrm{m/s}$$

Question 13

Which of the following best describes inertia?

Accepted Answer

A property of matter to resist changes in motion.

Question 14

A box is pulled to the right with a force of 15 N and to the left with a force of 10 N. What is the net force acting on the box?

Accepted Answer

$$5\ \mathrm{N} to $$the right

Question 15

Which of the following is an example of dynamic equilibrium?

Accepted Answer

A hockey puck sliding at constant speed on slippery ice.

Question 16

If you toss a coin straight up while riding in a train moving at constant velocity, where will the coin land?

Accepted Answer

Back in your hand.

Question 17

Which equation correctly expresses the equilibrium rule for forces?

Accepted Answer

$$\sum \vec{F} = 0$$

Question 18

A 10-N object is suspended at rest by two vertical strands of rope. What is the tension in each rope?

Accepted Answer

$$5\ \mathrm{N}$$

Question 19

Which of the following best explains why dishes remain on a table when you yank away a tablecloth quickly?

Accepted Answer

Inertia

Question 20

Which of the following is the most fundamental science?

Accepted Answer

Physics

Conceptual Physics: About Science & Newton's First Law of Motion (Inertia)

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