Simple question about velocity/acceleration

  • Thread starter emma402
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In summary, an object can be moving when its acceleration is zero for any length of time, and it can also be accelerating when its velocity is zero, but only for one moment in time. It is possible for a decelerating object to have a constant acceleration if its initial velocity is positive and its acceleration is negative, or vice versa.
  • #1
emma402
36
0
Can an object be moving when its acceleration is zero?
-it can for any length in time, correct?

And can an object be accelerating when its velocity is zero?
-it can, but only for one moment in time, correct?
 
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  • #2
Yes and Yes.
 
  • #3
Jay can you look at my two other my recent post about ball acceleration/velocity and velocity of a ball please?
 
  • #4
for 1st question certainly yes..any thing consisting constant velocity has 0 acceleration..

And for second ques...well...i think its not possible
 
  • #5
Phy.man said:
for 1st question certainly yes..any thing consisting constant velocity has 0 acceleration..

And for second ques...well...i think its not possible

I think the 3st question and the second are correct
the first one when an object moving with constant velocity so it's acceleration is 0
the second question occurs in many cases for example when an object moving in the +ve x direction and its acceleration is negative so that means it is decelerating at a moment when he object changes direction the velocity will be zero and the acceleration will still constant

best regards :)
 
  • #6
the second question occurs in
many cases for example when
an object moving in the +ve x
direction and its acceleration is
negative so that means it is
decelerating at a moment when
he object changes direction the
velocity will be zero and the
acceleration will still constant
best regards :)
how can a decelerating object have a constant acc?
 
  • #7
Phy.man said:
how can a decelerating object have a constant acc?

when it's initial velocity is positive and its acceleration is negative or vies versa.
 

1. What is the difference between velocity and acceleration?

Velocity is the rate of change of an object's position over time, while acceleration is the rate of change of an object's velocity over time. In simpler terms, velocity measures how fast an object is moving, while acceleration measures how much an object's speed is changing.

2. How are velocity and acceleration related?

Velocity and acceleration are related through the equations of motion, specifically the equation a = dv/dt. This means that acceleration is equal to the change in velocity over time. In other words, acceleration is the derivative of velocity.

3. Can an object have a constant velocity and changing acceleration?

Yes, an object can have a constant velocity and changing acceleration. This occurs when an object is moving at a constant speed in a curved path, such as a car driving around a circular track. In this case, the object's velocity is constant, but its direction is constantly changing, resulting in a changing acceleration.

4. What is the difference between average velocity 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 provides information about an object's velocity at a specific point in time.

5. How can velocity and acceleration be calculated from a position-time graph?

Velocity can be calculated by finding the slope of the line on a position-time graph, which represents the object's displacement over time. Acceleration can be calculated by finding the slope of the line on a velocity-time graph, which represents the object's change in velocity over time.

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