0
Is it possible that a particle has zero velocity but still have a acceleration?
Wiki User
∙ 13y ago
If the velocity equals zero, the acceleration is also zero because the velocity hasn't changed, thus, the particle isn't accelerating anywhere.
This is not exactly true; at an instant in time the acceleration can be non-zero while the velocity is zero. However, this would change the velocity to non-zero after any amount of time.
An example of this is when you throw a ball into the air: at it's highest point, the velocity is zero (it changes from going upward to going downward, passing through zero for an instant). However the acceleration is downward the entire time.
Wiki User
∙ 11y ago
Wiki User
∙ 16y agoA particles velocity can be zero by way of a repulsion force stopping it from any initial velocity greater than zero.....The particle will then obtain a velocity in opposite direction if repulsion force is maintained. The crossover of the two velocities is zero. Submitted...Ed kobek bsee northwestern U.
Wiki User
∙ 13y agoOnly for an instant. Acceleration is a change in velocity. When the derivative of acceleration with respect to time is zero, the velocity would be zero.
Wiki User
∙ 12y ago10% off your first purchase for a limited time.
Add your answer:
Earn +20 pts
Can an object have kinetic energy but no momentum?
No. To have kinetic energy, it must have both mass and velocity; the expression is Ek = 0.5mv2. To have momentum, something must also have mass and velocity; the expression for this is p = mv. Hence , if something has kinetic energy, you know it has momentum, and you can actually derive one from the other (provided you know the velocity); p = 2Ek/v.
Accelation due to change in direction?
Acceleration is a change in velocity with respect to time. Velocity is a vector quantity, meaning it has both a direction and a speed. Acceleration is therefore also a vector quantity. So if you change the direction an object is moving without changing its speed, you are still accelerating the object.The best example of this is circular motion. If you tie a string to a rock and swing around your head at a steady rate, the speed of the rock stays the same but its direction is continually changing. It is accelerating, and the acceleration vector points directly to the center of rotation.
Can you accelerate and keep the same speed?
Acceleration means any change in either speed or direction of motion.If speed remains constant, there may still be acceleration present if thedirection of the motion is changing.If the rate at which speed and/or direction are changing remains constant,then the acceleration is constant
Which is the smallest particle of sugar that still has all the properties of sugar?
molecule
What can acceleration can be changed by?
Movement is a change in position over some time.Speed is the rate at which you move.(i.e. 40mph)Velocity is an object's speed and direction.(i.e. 40mph north)Acceleration is how much your velocity changes over some time.(i.e. 40m/sec/sec north)The equation for acceleration is (Final Velocity - Original Velocity)/Time. Imagine a vehicle starting off driving at 0 m/sec, okay? In the next second, it's traveling at 1 m/sec. In the next second, it's traveling at 2 m/sec. In the third second, it's traveling at 3 m/sec, and so on. The vehicle is accelerating because it's velocity is changing. To be even more precise, the vehicle is accelerating at a rate of 1 m/sec/sec, or 1 meter per second per second. This means that every second, the velocity changes by one second.Remember that acceleration is change in velocity over some time. So if your velocity changes, then you're accelerating. If you're moving at a constant speed, you don't really feel like your accelerating, do you? But in fact, you are. Keep in mind that if you change direction, you are also changing velocity, and so you are accelerating. Even when we are standing still on the Earth, we are accelerating relative to the sun and other heavenly bodies since the Earth is always rotating and changing direction.Acceleration doesn't always mean going faster. You can also decelerate, which you can figure is similar to slowing down. Imagine being on a roller coaster. As you dropped down a giant slope, the velocity of the coaster got faster and faster; you were accelerating. After that giant slope you get ready for another one(not the cranking kind. this slope is like a [[User:TieMyShooes|TieMyShooes]] 01:37, 25 Feb 2008 (UTC)) The coaster is decelerating up the slope because rather than getting faster in velocity, it's getting slower. However, the velocity you got from going down the previous slope gives you enough momentum to push you up the next one and so on. Whoohoo, fun!So to sum it up, acceleration can be changed by a)speed and b)direction, which we know as c)velocity. =D
Can a body have zero velocity and still acceleration?
No. A velocity indicates a speed and direction. An acceleration is a change in speed or direction.
When average velocity is equal to its instantaneous velocity acceleration?
you are still. motion is at rest.
How an object could still be moving with the 0 acceleration?
Zero acceleration means that the velocity doesn't change. It doesn't mean that there is no velocity.
Does an object's speed increase even if acceleration decreases?
Acceleration is nothing but rate of increase in velocity. If acceleration at the time is positive velocity will increase independent of acceleration in past. Suppose you are moving at 5m/s at t=0. Acceleration is 5m/s2 initially. At t = 1 your velocity will be 10m/s. If acceleration became 3m/s2, then your velocity at t = 2 will be 13m/s. Thus your velocity still increased but comparatively lesser in amount. Now if acceleration became -8m/s2, velocity at t = 3 will be 5m/s, thus velocity decrease due to negative acceleration.
An object with a constant acceleration but with zero velocity what is mean is n't possible.?
Yes, it can happen. when the velocity is momentarily zero while an object is changing from moving in the positive direction motion to the negative direction; the object obviously will stop at one point, but will still have a constant acceleration.
Only one force acts on an object can the object have zero acceleration or zero velocity?
It is not possible for acceleration to have zero acceleration because the force acting on the object is gravity and g=9.8m/s squared. Gravity is the acceleration It can however have a zero velocity
Does an object that is moving in a linear path with an acceleration in the direction opposite to the motion have a decreasing velocity?
No. Acceleration is Delta-Velocity / Delta-Time. If Acceleration is negative then that means that either Delta Velocity is negative or Delta Time is negative---which is not practical. For Acceleartion to be negative, that means the Velocity has to Decrease. (where Delta Velocity is change in Velocity or V2 - V1)
Can a body have accerlation butb still have zero velocity?
Yes, it is possible. When a body thrown upward (from the surface of Earth or any other planet but with velocity small enough not to overcome the gravity) and reaches its maximum elevation its velocity is zero but the acceleration is g (due to gravity).
How is Acceleration related to speed?
Acceleration is the rate of change of velocity (not speed). Acceleration is the rate of change of velocity over time. Velocity is defined by speed and direction. A satellite orbiting the earth at a constant speed is still accelerating because gravity is making it travel in a circle (or ellipse) and consequently its direction and therefore its velocity is constantly changing.
Why is it an object can accelerate while travelling at constant speed but not at constant velocity?
Acceleration means the velocity changes. Velocity is made up of speed and a direction, so if only the direction changes, the velocity still changes, and therefore there is acceleration. The typical example is moving around in a circle.
Can a situation exist in which an object has zero velocity and nonzero acceleration?
Imagine throwing a ball upwards. It slows down(negative acceleration), and is eventually brought to a stop for a moment before starting to accelerate downwards. Keep in mind that throughout the entire journey there is a downward acceleration of g(9.81 m s-2) acting on the ball, even at that moment where the ball stopped mid-air. Of course that condition was only temporary, but it is still possible nonetheless.
When velocity is negative and acceleration is positive what happens to an objects motion?
Its slowing down (but still moving).
