Question

Directions: This section of the exam consists of questions or incomplete statements followed by five possible answers or completions. Select the best answer or completion, and fill in the corresponding bubble on the answer sheet. A projectile is launched with an initial velocity $v$ at an upward angle $\theta,$ as shown above. During the entire motion, which variable(s) remain(s) constant? I. Horizontal component of velocity II. Vertical component of velocity III. Acceleration (A) I only (B) II only (C) III only (D) I and II only (E) I and III only

Name: Problem 18, Chapter 24: Physics SAT Subject Test
Uploaded: 2021-05-05T22:15:07-08:00
Duration: 1 min 24 s
Channel: Brian Francisco

   Directions: This section of the exam consists of questions or incomplete statements followed by five possible answers or completions. Select the best answer or completion, and fill in the corresponding bubble on the answer sheet.

A projectile is launched with an initial velocity $v$ at an upward angle $\theta,$ as shown above. During the entire motion, which variable(s) remain(s) constant?
I. Horizontal component of velocity
II. Vertical component of velocity
III. Acceleration

(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only

Physics SAT Subject Test

Robert Jansen, Greg… 2nd Edition

Chapter 24, Problem 18

Instant Answer

Solved by Expert Brian Francisco

05/05/2021

Step 1

We need to determine which variables remain constant during the entire motion. The options are the horizontal component of velocity (I), the vertical component of velocity (II), and acceleration (III). Show more…

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Directions: This section of the exam consists of questions or incomplete statements followed by five possible answers or completions. Select the best answer or completion, and fill in the corresponding bubble on the answer sheet. A projectile is launched with an initial velocity $v$ at an upward angle $\theta,$ as shown above. During the entire motion, which variable(s) remain(s) constant? I. Horizontal component of velocity II. Vertical component of velocity III. Acceleration (A) I only (B) II only (C) III only (D) I and II only (E) I and III only

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Key Concepts

Gravity

Gravity provides a constant acceleration (approximately 9.8 m/s² on Earth) that acts vertically downward, influencing the vertical motion of any projectile throughout its flight.

Vertical Motion

The vertical component of velocity is continuously altered by gravity, leading to a uniform acceleration downward that decelerates the object on its upward path and accelerates it on its downward path.

Horizontal Motion

In projectile motion, the horizontal component of velocity remains constant in magnitude because, in the absence of air resistance, there are no horizontal forces acting on the object.

Projectile Motion

Projectile motion refers to the motion of an object that is launched into the air and moves under the influence of gravity, with its horizontal and vertical components analyzed separately.

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