Doubts regarding 3 question form motion of a particle

In summary, the conversation revolved around doubts regarding 3 problems related to the motion of a particle. The first problem involved finding a general equation for the total distance traveled after the particle starts decelerating with a certain retardation. The second problem was related to a similar problem in the Irodov general problems book. The third problem involved using vectors and the dot product to find a solution, but more details were needed to provide assistance.
  • #1
zacky_D
7
0
Doubts regarding 3 question form motion of a particle! :)

Homework Statement



Doubts related to 3 problems..I have uploaded the question up in the attachment.

Homework Equations





The Attempt at a Solution


for question one,the body doesn't come to rest,s is the total dist at any instant after it started decelerating with retardation β.If it comes to rest,answer is 2s/v,and such a problem is there in irodovs general problems book..but how to get a general equation,for any instant after it starts decelrating with b?

question 3:i attempted using vectors and taking dot product equal to zero,but didnt arrive anywher,so someone please help! :)
 

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  • #2


Someone please Reply! :(
 
  • #3


zacky_D said:

Homework Statement



Doubts related to 3 problems..I have uploaded the question up in the attachment.

Homework Equations



The Attempt at a Solution


for question one,the body doesn't come to rest,s is the total dist at any instant after it started decelerating with retardation β.If it comes to rest,answer is 2s/v,and such a problem is there in irodovs general problems book..but how to get a general equation,for any instant after it starts decelerating with b?

question 3:i attempted using vectors and taking dot product equal to zero,but didn't arrive anywhere,so someone please help! :)
Hello zacky_D. Welcome to PF !
zacky_D said:
Someone please Reply! :(
Patience, Please !

While you're waiting for a reply, please read the rules for this Forum. You will see there that you should wait 24 hours before "bumping" your thread.


For Problem #1: You are correct in regards to you conclusion that the car nedds to come to rest in order for a solution to be possible.

As regards the somewhat similar Irodov problem, I believe that the Irodov problem assumes that the magnitude of the acceleration, α, is equal to the magnitude of the deceleration, β. In that case, the total time is s/vaverage = 2s/vmax. You generally would want to express this answer in terms of s and α, not s and vmax .


As for your attempt at a solution to #3: You will need to give more details as to what you tried, before we can be of much help.
 

Related to Doubts regarding 3 question form motion of a particle

1. What is the 3 question form motion of a particle?

The 3 question form motion of a particle is a way of describing the motion of a particle using three key questions: 1. Where is the particle? 2. What is the particle's velocity? 3. What is the particle's acceleration? By answering these questions, we can fully describe the position, velocity, and acceleration of a particle at any given time.

2. How is the 3 question form motion of a particle different from other motion equations?

The 3 question form motion of a particle is different from other motion equations in that it focuses on three specific questions that fully describe the motion of a particle. Other equations, such as the equations of motion or the kinematic equations, may require different variables or may be more complex in their calculations.

3. What are some real-world applications of the 3 question form motion of a particle?

The 3 question form motion of a particle is commonly used in a variety of fields, including physics, engineering, and mechanics. It is used to describe the motion of objects such as cars, airplanes, and satellites. It is also used in sports, such as calculating the trajectory of a baseball or the movement of a gymnast during a routine.

4. Can the 3 question form motion of a particle be used for all types of motion?

Yes, the 3 question form motion of a particle can be used for all types of motion, including linear, circular, and projectile motion. As long as the three key questions of position, velocity, and acceleration can be answered, this form of motion can be applied.

5. How can we use the 3 question form motion of a particle to solve problems?

To solve problems using the 3 question form motion of a particle, we first identify the three key questions: 1. Where is the particle? 2. What is the particle's velocity? 3. What is the particle's acceleration? Then, we use the appropriate equations and known values to solve for the unknown variable. It's important to pay attention to units and use consistent units throughout the calculations.

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