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No. A velocity indicates a speed and direction. An acceleration is a change in speed or direction.
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Where can you find Prentice hall physics answers?
can a body have zero velocity and still be accelerating
Meaning of zero acceleration?
Zero acceleration means no change in velocity and no force on the zero accelerating body.
Give an example in which velocity is zero yet acceleration is not zero?
Velocity is directional, so if something is accelerating in the opposite direction from the one it is moving it, there will come a point where it has 0 velocity but still has accelerating. If you throw a ball at the ground and it bounces, for example.
Can particle with velocity or speed at zero be accelerating?
Yes.
Can an object have zero velocity but still have an acceleration?
A simple example is a ball tossed into the air. When the ball reaches its apex -- its highest point -- its instantaneous velocity is zero. If we assume that up is the positive direction, the ball's velocity is positive when it is initially tossed into the air, but it slows immediately. That is, its velocity becomes less positive until it reaches zero velocity. After that point, the velocity becomes increasingly negative (because down is the negative direction). Until the ball returns to earth and reaches the height at which it was initially thrown, its average velocity is non-zero. If the ball is allowed to hit the ground, its average velocity will be slightly negative, which is still non-zero. But it still had an instant -- at its apex -- when its velocity was zero.
Where can you find Prentice hall physics answers?
can a body have zero velocity and still be accelerating
Meaning of zero acceleration?
Zero acceleration means no change in velocity and no force on the zero accelerating body.
Can a body have zero velocity and still can be acclerating?
Yes. You are holding your hand out. A tennis ball is floating just above it. The velocity of your body relative to the ball is zero. Why is the ball floating? Because you and the ball and the whole elevator are accelerating down to the ground. ---- Here's a proof by reductio ad absurdum that it's possible: If it were not possible for a body to have zero velocity and be accelerating, once anything stopped moving it could never move again.
Give an example in which velocity is zero yet acceleration is not zero?
Velocity is directional, so if something is accelerating in the opposite direction from the one it is moving it, there will come a point where it has 0 velocity but still has accelerating. If you throw a ball at the ground and it bounces, for example.
Can particle with velocity or speed at zero be accelerating?
Yes.
What is zero accelaration?
When an object is not accelerating at all. It has constant velocity.
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.
Can an object have zero velocity but still have an acceleration?
A simple example is a ball tossed into the air. When the ball reaches its apex -- its highest point -- its instantaneous velocity is zero. If we assume that up is the positive direction, the ball's velocity is positive when it is initially tossed into the air, but it slows immediately. That is, its velocity becomes less positive until it reaches zero velocity. After that point, the velocity becomes increasingly negative (because down is the negative direction). Until the ball returns to earth and reaches the height at which it was initially thrown, its average velocity is non-zero. If the ball is allowed to hit the ground, its average velocity will be slightly negative, which is still non-zero. But it still had an instant -- at its apex -- when its velocity was zero.
At what points does velocity change direction?
The velocity of an object can only change if it is accelerating and if this is constant and continuous. Velocity will also only change direction if acceleration is greater than zero and will not work if at zero.
Is the net force acting on a body is zero will the velocity be zero?
No, The velocity CHANGE will be zero
Can a particle with zero acceleration spead up?
When it has zero acceleration, it is moving at a constant velocity. If you change that velocity then it is accelerating. Remember velocity is a constant speed in a given direction. If the direction changes, then its velocity is changing hence it is accelerating. That's why if you go round in a circle , e.g. a fairground ride, your velocity is changing, hence you are accelerating, and so feel as though you are going to be thrown outwards. Remember Sir Isaac Newton's three laws of Universal Dynamics. A body/mass will remain stationary or in uniform motion, unless acted upon by a force. Force is directly proportional to body/mass and acceleration. To every force there is an equal and opposite force.
Can an object be accelerating if it has constant velocity?
No. The definition of acceleration is the change in an object's velocity over time. Acceleration must then be zero since velocity remains constant.
