Q: A 2 kg object is dropped from a height of 10 m. Ignoring air resistance, what is its speed just before hitting the ground? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

$$v = \sqrt{2 g h} = \sqrt{2 \times 9.8 \times 10} \approx 14\ \mathrm{m/s}$$

Question 1

Which of the following best describes the primary focus of PHYS 213: Engineering Physics I?

Accepted Answer

The study of mechanics, heat, and fluids using algebra, trigonometry, and calculus.

Question 2

A student is working on a homework problem involving a block sliding down an inclined plane. To solve for the acceleration of the block, which of the following is the most appropriate first step?

Accepted Answer

Draw a free-body diagram and resolve forces parallel and perpendicular to the incline.

Question 3

During a studio lab, you are asked to experimentally verify the relationship between force and acceleration. Which equation should you use to analyze your data?

Accepted Answer

$$F = m a$$

Question 4

A car of mass $$m is $$moving at velocity $$v$$ and comes to a stop over a distance $$d$$ due to a constant braking force. Which equation would you use to find the magnitude of the braking force?

Accepted Answer

$$F = m a$$,\quad a = \frac{$$v^2$$}{2d}$

Question 5

Which of the following best describes the purpose of the studio sessions in PHYS 213?

Accepted Answer

To perform hands-on experiments and group problem-solving activities.

Question 6

A student measures the period $$T of a $$simple pendulum of length $$L$$ and mass $$m. $$Which formula should be used to calculate the acceleration due to gravity $$g$$ from the measurements?

Accepted Answer

$$g = \frac{4 \pi^2$ L}{T^2$}$$

Question 7

In a fluid mechanics experiment, you are asked to determine the pressure at a depth $$h$$ below the surface of a liquid of density $$\rho. $$Which equation is most appropriate?

Accepted Answer

$$P = P_0$ + \rho g h$$

Question 8

A rotating disk has a moment of inertia $$I$$ and angular velocity $$\omega. $$What is the rotational kinetic energy of the disk?

Accepted Answer

$$K = \frac{1}{2} I \$$omega^2$$

Question 9

A student is analyzing a collision between two carts on a frictionless track. Which principle should be used to determine the final velocities if the collision is perfectly elastic?

Accepted Answer

Conservation of both momentum and kinetic energy.

Question 10

A 2 kg object is dropped from a height of 10 m. Ignoring air resistance, what is its speed just before hitting the ground? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$v = \sqrt{2 g h} = \sqrt{2 	imes 9.8 	imes 10} \approx 14\ \mathrm{m/s}$$

Question 11

Which of the following is a correct statement about the grading policy in PHYS 213?

Accepted Answer

Your lowest three homework and lab report scores will be dropped.

Question 12

A student is asked to calculate the work done by a force $$F$$ moving an object a distance $$d at an $$angle $$	heta to $$the direction of motion. Which equation should be used?

Accepted Answer

$$W = F d \cos 	heta$$

Question 13

During a lab, you measure the volume and mass of a metal sample to determine its density. If your measurements have uncertainties, which of the following best describes how to report your final result?

Accepted Answer

Report the density with its uncertainty, using significant figures that reflect the measurement precision.

Question 14

A student is solving a problem involving a projectile launched at an angle $$	heta$$ with initial speed $$v_0. $$Which equation gives the maximum height reached by the projectile?

Accepted Answer

$$h_{max} = \frac{v_0$^2 \sin^2$ 	heta}{2g}$$

Question 15

Which of the following is a requirement to pass PHYS 213, regardless of your other grades?

Accepted Answer

You must take the final exam and score at least 30% on it.

Question 16

A fluid flows through a horizontal pipe that narrows from a wide section to a narrow section. According to the continuity equation, what happens to the speed of the fluid as it enters the narrow section?

Accepted Answer

The speed increases.

Question 17

A student is asked to analyze the energy transformation in a roller coaster as it descends from the top of a hill. Which principle is most appropriate to use?

Accepted Answer

Conservation of mechanical energy: $$E_{mech} = K + U$$

Question 18

A rotating wheel slows down due to friction. Which of the following best describes the effect of friction on the angular momentum of the wheel?

Accepted Answer

Friction exerts a torque that decreases the angular momentum over time.

Question 19

A student is working on a problem involving the buoyant force on a submerged object. Which equation should be used to calculate the buoyant force?

Accepted Answer

$$F_{b} = \rho_{fluid} V_{displaced} g$$

Question 20

A student is asked to determine the uncertainty in a calculated value that depends on two measured quantities, $$A$$ and $$B$$, each with their own uncertainties. Which of the following best describes the correct approach?

Accepted Answer

Use error propagation formulas to combine the uncertainties from $$A$$ and $$B.$$

PHYS 213: Engineering Physics I – Syllabus and Course Overview (Fall 2026)

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