4) a) Can an object be moving when its acceleration is zero? … Yes, an object that was set in motion in the past by some force, but that is no longer being acted on by a net force, is moving but with zero acceleration, i.e. it is moving at constant velocity.
What happens when acceleration is zero?
If there is no acceleration, then the object will move with a constant velocity. Mathematically, we can look at Newton’s second law and the formula for acceleration. … Since we know that the mass cannot be zero, the acceleration must be zero.
Can an object have zero acceleration when it is moving explain your answer with examples?
Yes. Anytime the velocity is constant, the acceleration is zero. For example, a car traveling at a constant 90 km/h in a straight line has nonzero velocity and zero acceleration.
Does 0 velocity mean 0 acceleration?
Yes indeed. Derivative of velocity with respect to time is acceleration. That means if accelerations is zero, velocity must be constant. … Also if the velocity is 0(which is itself a constant) also indicates that acceleration is zero.
How do you know if acceleration is 0?
When acceleration is zero (that is, a = dv/dt = 0), rate of change of velocity is zero. That is, acceleration is zero when the velocity of the object is constant. Motion graphs represent the variations in distance, velocity and acceleration with time.
Can a body have acceleration with zero velocity?
Answer: Yes, an object can have zero velocity and still be accelerating simultaneously.
What is the difference between positive and negative acceleration?
Mathematically, a negative acceleration means you will subtract from the current value of the velocity, and a positive acceleration means you will add to the current value of the velocity.
Why acceleration is maximum when velocity is zero?
At zero velocity, there is still a net force acting on the object due to the spring, so the object will accelerate in the opposite direction. … In this whole process, the acceleration is constant, but the velocity is still zero at its highest point. More mathematically: a=−g=dvdt.
When velocity is 0 What is acceleration?
so if the velocity does not change with time the acceleration is necessarily zero. Since in your example the velocity is constant during the interval that means dv/dt=0 and therefore that a=0 during the interval.
Can an object have a speed of zero while it has an acceleration that is not zero?
Yes. Consider a object which reverses direction due to acceleration in opposite direction. Then when the object reverses direction, momentarily instantaneous speed is zero but acceleration is not.
What is an example of zero acceleration?
No acceleration means no change in velocity. For example an apple thrown in space. … A photon has zero acceleration because it can’t be accelerated. All other examples of zero acceleration are where the “thing” is moving at a constant velocity relative to an inertial reference frame.
Is the acceleration ever zero?
Yes. Typically, if the velocity is a constant, then the acceleration is zero. Acceleration is the rate of change of the velocity. So as long as the velocity does not change (no matter what value it has), the acceleration is zero.
Is acceleration 0 at the highest point?
At a projectile’s highest point, its acceleration is zero.
Can a body have acceleration at rest?
Answer. Yes, A body can have acceleration while at rest,but it will be negative acceleration or retardation.
Can a body have constant speed but varying velocity?
No, a body can not have its velocity constant, while its speed varies. Rather, it can have its speed constant and its velocity varying. For example in a uniform circular motion.
What is called negative acceleration?
The other name of negative acceleration is Retardation or Deceleration. A deceleration is opposite to the acceleration. The deceleration means the decrease in the speed of body/object movement.
Is there a negative acceleration?
This represents an object that has a constant speed. It is not speeding up or slowing down, so it has zero acceleration. Because the velocity/speed of this object is decreasing over time, this means there is a negative acceleration.
Can a body have positive velocity and negative acceleration?
Yes, a body can have positive velocity and negative acceleration at the same time.
At what points the acceleration is minimum and maximum in SHM?
” In Simple Harmonic Motion, the maximum of acceleration magnitude occurs at x = +/-A (the extreme ends where force is maximum), and acceleration at the middle ( at x = 0 ) is zero. ” a = (d2x /dt2) = -Aω2 cos ( ωt).
At what point or position acceleration is maximum Why?
Acceleration in SHM
When the displacement is maximum, the acceleration is maximum, because the spring applies maximum force; the force applied by the spring is in the opposite direction as the displacement.
What is acceleration at maximum speed?
Maximum speed is the highest rate of speed an athlete can attain. Acceleration refers to velocity, and because velocity has both a magnitude and direction associated with it, acceleration changes when athletes change the magnitude of their motion (how fast they are running), the direction of their motion, or both.