Gerak Lurus • Part 5: Gerak Vertikal Atas (GVA), Gerak Vertikal Bawah (GVB), Gerak Jatuh Bebas (GJB)

Summary

In this video, the channel explores vertical motion in physics, focusing on three types: upward motion (GPA), downward motion (GVB), and free fall. It explains the principles and equations governing these motions, including how to calculate height, time, and velocity. Key concepts such as gravitational acceleration and initial velocity are discussed, along with practical examples to illustrate the calculations. The video aims to simplify complex topics in high school physics, making it accessible for students eager to understand the dynamics of vertical motion.

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Q & A

What is vertical motion?

Vertical motion refers to movement that is perpendicular to the horizontal plane, or parallel to the y-axis, such as an object thrown upwards or falling downwards.

What are the three types of vertical motion discussed in the script?

The three types of vertical motion discussed are: (1) Vertical upward motion (GVA), where an object is thrown upwards with an initial velocity; (2) Vertical downward motion (GVB), where an object is thrown downwards with an initial velocity; and (3) Free fall (GB), where an object is dropped from a certain height without any initial velocity.

What is the difference between GVA and GB?

The main difference between GVA (Vertical upward motion) and GB (Free fall) is that in GVA, the object is thrown with an initial velocity, whereas in GB, the object is dropped without any initial velocity.

How is the formula for vertical motion similar to the formula for horizontal motion?

The formulas for vertical motion are similar to those for horizontal motion in that they can be derived from the basic equation of motion, but with modifications to account for vertical displacement, initial velocity, and acceleration due to gravity.

What is the acceleration due to gravity and how is it represented?

The acceleration due to gravity is represented by 'g' and is approximately 9.8 m/s^2. It is often rounded to 10 m/s^2 for simplicity in calculations.

What is the formula for calculating the final velocity (Vc) in vertical motion?

The formula for calculating the final velocity (Vc) in vertical motion is Vc = v0 - gt, where v0 is the initial velocity, g is the acceleration due to gravity, and t is the time.

How is the formula for vertical motion with initial height modified?

The formula for vertical motion with initial height (y0) is modified by adding y0 to the standard motion formula, resulting in y = y0 + v0t - (1/2)gt^2.

What is the significance of the term 't_max' in the context of vertical motion?

't_max' refers to the time it takes for an object to reach its maximum height in vertical motion. It is calculated using the formula t_max = v0/g.

What is the formula to calculate the maximum height (ymax) an object reaches in vertical motion?

The formula to calculate the maximum height (ymax) an object reaches in vertical motion is ymax = y0 + v0^2/(2g).

How do you determine the time and velocity of an object when it hits the ground from a certain height in free fall?

The time to hit the ground in free fall is calculated using the formula t = √(2y0/g), and the velocity upon impact is calculated using the formula V_ground = √(2gy0).

What is the significance of a negative value in the context of vertical motion?

A negative value in vertical motion indicates that the object is moving downwards. For example, a negative final velocity (Vc) means the object is moving downwards upon impact with the ground.