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Ravela Da Cruz

HS-PS2-1

Average Velocity Study Guide

Finding average velocity is similar to finding average speed, and it's the rate at which an object moves over time.

INTRODUCTION

We generally hear that now everyone wishes to pitch a baseball as fast as they can. In fact, we all idealise the famous rookie Aroldis Chapman for his 105.1 miles per hour fireball. But the term ‘fast’ here is a vague term for the physical concept of velocity. The maximum speed of a specific pitch at any moment from its release to the time it crosses home plate is represented as velocity, one of the most commonly utilized tools for evaluating pitchers.

pitch Source

VELOCITY AND SPEED

The terms speed and velocity are commonly used interchangeably in everyday language to describe how fast an object is moving. Nevertheless, they are significantly different in physics. The magnitude of an object's velocity, regardless of direction, is called speed. Velocity rather encompasses both speed and direction. Because it's a vector, it needs a magnitude and a direction.

AVERAGE VELOCITY

  • Average velocity’s definition is the time duration of the object selected divided by the displacement in relation to the initial position.
  • To put it another way, it's the rate at which an object moves over time.
  • The SI unit of average velocity is similar to the average speed, in meters per second.
  • The average velocity's direction is the displacement's direction.
  • Even though the item's speed varies and its magnitude changes, the item's direction remains the same as that of the direction of displacement.
  • As displacement is less than or equivalent to the distance traveled, the quantity of average velocity is less than or equivalent to the average speed.

AVERAGE VELOCITY FORMULA

avg vel Source

  • The formulae for the average velocity and the average speed are the same ( described in the image), but the only variation is the type of physical measure, which is speed or velocity in this case.
  • Speed is a single-magnitude scalar quantity.
  • Velocity, on the other hand, is a vector quantity with both magnitude and direction.
  • The mathematical description of average velocity can be

Average velocity (V) = x1 - x2 ( net displacement ) / t1 - t2 ( net time)

An example of the average velocity can be

In 5 hours, a truck driver travels 20 miles ( 32.18 KM) down the road. He then changes direction and travels 12 miles ( 19.3 KM) in 3 hours. What's his average velocity?

We know v ( average velocity ) = net displacement / net time Therefore , v = (20- 12)/ (5 3 ) And finally, the average velocity will be 1 kilometer/hour.

SUMMARY

  • The magnitude of an object's velocity, regardless of direction, is called speed, and Velocity encompasses both speed and direction.
  • Average velocity’s definition is the time duration of the object selected divided by the displacement in relation to the initial position.
  • The formula for the average velocity and the average speed are same Average velocity (V) = x1 - x2 ( net displacement ) / t1 - t2 ( net time)

FAQs

1. When is the average velocity zero?

The average velocity will be zero in all the cases where the net displacement would be zero.

2. Can average velocity be zero?

Yes, when the net displacement is zero, the average velocity would be zero.

3. Is Average velocity a vector or a scalar?

Just like velocity, the average velocity has a direction and therefore is a vector quantity.

4. How to calculate average velocity?

Average velocity can be calculated using the formula. Average velocity (V) = x1 - x2 ( net displacement ) / t1 - t2 ( net time)

We hope you enjoyed studying this lesson and learned something cool about Average Velocity! Join our Discord community to get any questions you may have answered and to engage with other students just like you! Don't forget to download our App to experience our fun VR classrooms - we promise, it makes studying much more fun!😎

REFERENCE

  1. Average Velocity:https://www.vedantu.com/physics/average-velocity Accessed 8th April