Question

A car accelerated from initial position and then returned at initial point, then (a) Velocity is zero but speed increases (b) Speed is zero but velocity increases (c) Both speed and velocity increase (d) Both speed and velocity decrease

Name: Problem 5, Chapter 2: Genius Physics (Class 11) - For IIT-JEE and CBSE
Uploaded: 2022-03-06T15:28:48-08:00
Duration: 1 min 56 s
Channel: Saman Zulfiqar
Description: A car accelerated from initial position and then returned at initial point, then (a) Velocity is zero but speed increases (b) Speed is zero but velocity increases (c) Both speed and velocity increase (d) Both speed and velocity decrease

   A car accelerated from initial position and then returned at initial point, then
(a) Velocity is zero but speed increases
(b) Speed is zero but velocity increases
(c) Both speed and velocity increase
(d) Both speed and velocity decrease

Genius Physics (Class 11) - For IIT-JEE and CBSE

Pradeep Kshetrapal 1st Edition

Chapter 2, Problem 5

Instant Answer

Solved by Expert Saman Zulfiqar

03/06/2022

Step 1

Step 1: Interpret scenario — a car accelerates from initial position (implying nonzero acceleration) and then returns to the initial point (displacement zero), so it underwent motion forward then back; final velocity at return is zero (came to rest at initial Show more…

Show all steps

Thanks for your feedback!

A car accelerated from initial position and then returned at initial point, then (a) Velocity is zero but speed increases (b) Speed is zero but velocity increases (c) Both speed and velocity increase (d) Both speed and velocity decrease

Play audio

Feedback

Saman Zulfiqar and 51 other subject Physics 101 Mechanics educators are ready to help you.

Ask a new question

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Speed vs. Velocity

Speed is a scalar measure that indicates how fast an object is moving, without taking direction into account. Velocity, on the other hand, is a vector quantity that specifies both the speed and the direction of motion. This fundamental difference means that even if an object has a high speed, its velocity can be zero if the directional components cancel out over the course of its motion.

Displacement and Its Effect on Average Velocity

Displacement refers to the net change in position of an object from its starting point to its ending point. In cases where an object returns to its initial position, the displacement is zero. Since average velocity is calculated as displacement divided by time, it results in a zero average velocity, despite the possibility that the object may have traveled at varying speeds throughout its journey.

Please give Ace some feedback