DYNAMICS QUESTION S.O.S (kinematics of particle)

In summary, the conversation is discussing a physics problem involving the acceleration of a particle and using given data to calculate the time when velocity is zero and the velocity and total distance traveled at a specific time. The conversation also includes a suggestion to use standard constant acceleration equations to solve the problem.
  • #1
chrishatch
2
0
3 Days... and i still can't figure out 'how','why' and 'wat' is the answer...


THE ACCELERATION OF A PARTICLE IS DEFINED BY THE RELATION a=-8m/s^2.
KNOWING THAT x=20m when t=4s and that x=4m when v=16m/s,
determine:

a) the time when the velocity is ZERO.
b) the velocity and the total distance traveled when t = 11s...

THANK YOU...
 
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  • #2
welcome to pf!

hi chrishatch! welcome to pf! :smile:

(try using the X2 icon just above the Reply box :wink:)

always start questions like this by saying "let x and v be x0 and v0 at t = 0" …

then use the standard constant acceleration equations with the given data …

what do you get? :smile:​
 

1. What is the difference between kinematics and dynamics?

Kinematics is the study of motion without considering the forces that cause the motion. Dynamics, on the other hand, is the study of motion in relation to the forces acting on an object.

2. What is a particle in kinematics?

A particle in kinematics refers to a point object that is used to simplify the study of motion. It has no physical dimensions and its mass is concentrated at a single point.

3. What are the three types of motion in kinematics?

The three types of motion in kinematics are translational motion, rotational motion, and vibrational motion. Translational motion is when an object moves in a straight line, rotational motion is when an object rotates around an axis, and vibrational motion is when an object moves back and forth around a fixed position.

4. What is the difference between distance and displacement in kinematics?

Distance is the actual length of the path traveled by an object, while displacement is the shortest distance in a straight line between the initial and final position of an object. Distance is a scalar quantity, while displacement is a vector quantity with both magnitude and direction.

5. How is velocity calculated in kinematics?

Velocity is calculated as the change in position over the change in time. It is a vector quantity with both magnitude and direction. The formula for velocity is v=Δx/Δt, where v is velocity, Δx is change in position, and Δt is change in time.

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