PART 1/5 Penjelasan Gerak Lurus Beraturan GLB dan contoh soal GLB

Summary

In this online physics tutorial, the concept of Uniform Rectilinear Motion (GLB) is explained. The video covers the definition, characteristics, and formula of GLB, emphasizing constant speed and zero acceleration. The instructor demonstrates how to calculate distance, speed, and time using the formula S = V × T, with a practical example of a person cycling to a bookstore. Units are carefully converted (from kilometers to meters, minutes to seconds) to ensure accurate calculations. The session also prepares viewers for Part 2, which will cover GLB's graphical representation.

Takeaways

• 😀 GLB (Uniform Rectilinear Motion) refers to motion with constant speed, meaning the object's speed remains unchanged over time.
• 😀 In GLB, the acceleration is zero, as the object is moving with constant velocity.
• 😀 The formula for GLB is S = V × T, where S is the distance, V is velocity, and T is time.
• 😀 The units of S (distance) are meters (m), V (velocity) is meters per second (m/s), and T (time) is measured in seconds (s).
• 😀 A practical example was given where Indra travels a distance of 1.8 km to the bookstore, and it’s essential to convert the distance from kilometers to meters (1.8 km = 1800 m).
• 😀 Time must also be converted into seconds for consistency with the other units (30 minutes = 1800 seconds).
• 😀 The velocity formula in GLB can be rearranged as V = S / T to calculate the speed.
• 😀 Using the formula, Indra's required speed was calculated to be 1 m/s to reach the bookstore in the given time.
• 😀 The importance of unit conversions was highlighted, such as converting kilometers to meters and minutes to seconds.
• 😀 The video also mentioned that in the next part, the focus would shift to discussing the graphical representation of GLB, showing how distance (S) and time (T) relate to velocity (V) and acceleration (a).

Q & A

What is GLB (Gerak Lurus Beraturan)?

GLB, or Gerak Lurus Beraturan, refers to Uniform Linear Motion, where an object moves at a constant speed in a straight line, with no change in velocity over time.

What is the characteristic of an object in GLB?

In GLB, the object's velocity remains constant throughout the motion, meaning its speed does not change. The acceleration of the object is zero.

What does the acceleration of an object in GLB equal?

In GLB, the acceleration of an object is zero, as there is no change in velocity over time.

What is the formula for GLB?

The formula for GLB is: S = V * T, where 'S' is the distance traveled, 'V' is the velocity (speed), and 'T' is the time taken.

How can the GLB formula be rearranged?

The GLB formula can be rearranged in three ways: to find distance (S), use S = V * T; to find velocity (V), use V = S / T; and to find time (T), use T = S / V.

What are the units for S, V, and T in the GLB formula?

The units for S (distance) are meters (m), the units for V (velocity) are meters per second (m/s), and the units for T (time) are seconds (s).

How is distance (S) converted from kilometers to meters?

To convert distance from kilometers to meters, you multiply the number of kilometers by 1000. For example, 1.8 kilometers equals 1800 meters.

If an object moves 1.8 kilometers and takes 30 minutes, what is its velocity?

First, convert 30 minutes to seconds (30 * 60 = 1800 seconds). Then use the formula V = S / T. With S = 1800 meters and T = 1800 seconds, the velocity is 1 m/s.

How do you convert minutes to seconds in a GLB problem?

To convert minutes to seconds, multiply the number of minutes by 60. For example, 30 minutes equals 1800 seconds.

Why is it important to remember the conversion from kilometers to meters or minutes to seconds?

It is important to remember these conversions because the units in the GLB formula must be consistent. For instance, distance must be in meters, and time must be in seconds, for accurate calculations.