Q: Which conversion factor would you use to convert minutes to seconds?

$$1\ \text{min} = 60\ \text{s}$$

Question 1

A car travels 120 kilometers in 2 hours. What is its average speed in meters per second ($$\frac{m}{s}$$)?

Accepted Answer

$$16.67\ \frac{m}{s}$$

Question 2

Which of the following best describes proportional reasoning in physics?

Accepted Answer

Understanding how one variable changes in relation to another and using ratios to solve problems.

Question 3

A runner completes a 400 meter lap in 50 seconds. What is their average speed in kilometers per hour ($$\frac{km}{h}$$)?

Accepted Answer

$$28.8\ \frac{km}{h}$$

Question 4

If the direction of a force is described as 'upward and to the right at 30 degrees above the horizontal,' which is the correct way to indicate this in a physics answer?

Accepted Answer

Include both magnitude and direction, such as $$F = 10\ N at$$ $$30^\circ$$ above horizontal.

Question 5

A student needs to convert 3 hours into seconds. What is the correct answer?

Accepted Answer

$$10,800\ s$$

Question 6

Which of the following is NOT a recommended practice when presenting a final physics answer?

Accepted Answer

Using parentheses to indicate the answer.

Question 7

A cyclist travels at a constant speed. If the distance doubles, what happens to the time taken, assuming speed remains constant?

Accepted Answer

The time taken doubles.

Question 8

Which conversion factor would you use to convert minutes to seconds?

Accepted Answer

$$1\ 	ext{min} = 60\ 	ext{s}$$

Question 9

A student calculates the speed of a train as $$v = \frac{d}{t}$$, where $$d = 5000\ m$$ and $$t = 250\ s. $$What is the correct speed?

Accepted Answer

$$20\ \frac{m}{s}$$

Question 10

Which of the following is a common error when using calculators for physics problems?

Accepted Answer

Not using parentheses correctly, leading to order of operations mistakes.

Question 11

A student wants to convert 2.5 days into hours. What is the correct answer?

Accepted Answer

$$60\ h$$

Question 12

If a car moves at $$90\ \frac{km}{h}$$, how many meters does it travel in 40 seconds?

Accepted Answer

$$1,000\ m$$

Question 13

Which of the following best demonstrates the use of proportional reasoning in a real-world scenario?

Accepted Answer

Doubling the ingredients in a recipe to serve twice as many people.

Question 14

A student converts 0.75 hours to minutes. What is the correct answer?

Accepted Answer

$$45\ 	ext{min}$$

Question 15

When asked for a final answer in a physics problem, which of the following is the best practice?

Accepted Answer

Include the appropriate units and significant digits.

Question 16

A student needs to convert 5,000 seconds into hours. What is the correct answer?

Accepted Answer

$$1.39\ h$$

Question 17

Which of the following is the correct way to express a velocity vector pointing leftward with a magnitude of $$15\ \frac{m}{s}$$?

Accepted Answer

$$v = 15\ \frac{m}{s}$$, left

Question 18

A student is converting 120 minutes into days. What is the correct answer?

Accepted Answer

$$0.0833\ 	ext{days}$$

Question 19

Which of the following is a critical detail when solving physics problems involving direction?

Accepted Answer

Use appropriate directional terms like up/down, left/right, clockwise/counterclockwise.

Question 20

A student wants to convert 2 years into seconds. What is the correct answer?

Accepted Answer

$$63,072,000\ s$$

Physics Study Guide: Problem Solving, Proportional Reasoning, and Unit Conversions

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