Acceleration in Kinematics: How Does it Vary with Displacement?

  • Thread starter ritik.dutta3
  • Start date
In summary, the position of a particle along a straight line can be represented by x= sqrt( at+2bt + c), where a, b, and c are constants. To find the acceleration, take the second derivative of x with respect to t and then use dz/dx = (dz/dt)/(dx/dt). This will result in a messy equation, but it can be simplified by substituting for x.
  • #1
ritik.dutta3
8
0

Homework Statement



A particle moves along a straight line such that its displacement x changes with time t as x= sqrt( at+2bt + c) where a, b and c are constants, then the acceleration varies with x as

Homework Equations





The Attempt at a Solution


I can't figure out how do i solve it. Using graphs as well, I could not arrive at any conclusion.
 
Physics news on Phys.org
  • #2
The question is incomplete. Please post the full question
 
  • #3
No, @adjacent, the question isn't incomplete. We have to fill in the blank. "the acceleration varies with x as ________ ". Sorry for not mentioning it clearly!
 
  • #4
ritik.dutta3 said:
No, @adjacent, the question isn't incomplete. We have to fill in the blank. "the acceleration varies with x as ________ ". Sorry for not mentioning it clearly!

When you are given the position as a function of time, how do you find the acceleration using derivative?
 
  • #5
My suggestion:
First take second derivative of x with respect to t to get acceleration which we will call z.
Then use dz/dx = (dz/dt)/(dx/dt)

Looks messy, but technically correct. In the final result, substitute for x where it appears.
 

1. What is kinematics?

Kinematics is the branch of physics that deals with the motion of objects without considering the forces that cause the motion. It involves studying the position, velocity, and acceleration of objects over time.

2. What are the types of motion in kinematics?

The types of motion in kinematics are linear motion, circular motion, and rotational motion. Linear motion is when an object moves in a straight line, circular motion is when an object moves in a circular path, and rotational motion is when an object spins on its axis.

3. What is the difference between speed and velocity?

Speed is the rate at which an object moves, while velocity is the rate at which an object moves in a specific direction. Speed is a scalar quantity, meaning it only has magnitude, while velocity is a vector quantity, meaning it has both magnitude and direction.

4. How is acceleration calculated in kinematics?

Acceleration is calculated by dividing the change in velocity by the change in time. The formula for acceleration is a = (vf - vi) / t, where a is acceleration, vf is final velocity, vi is initial velocity, and t is time.

5. What is the difference between average and instantaneous velocity?

Average velocity is the total displacement of an object divided by the total time taken, while instantaneous velocity is the velocity of an object at a specific moment in time. Average velocity gives an overall picture of an object's motion, while instantaneous velocity gives information about its motion at a specific point in time.

Similar threads

  • Introductory Physics Homework Help
Replies
12
Views
324
  • Introductory Physics Homework Help
Replies
7
Views
263
  • Introductory Physics Homework Help
Replies
1
Views
2K
  • Introductory Physics Homework Help
Replies
5
Views
1K
  • Introductory Physics Homework Help
Replies
3
Views
821
  • Introductory Physics Homework Help
Replies
7
Views
1K
  • Introductory Physics Homework Help
Replies
29
Views
1K
  • Introductory Physics Homework Help
Replies
3
Views
859
  • Introductory Physics Homework Help
Replies
1
Views
776
Replies
8
Views
1K
Back
Top