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Can particle have zero speed and non zero velocity?
No.
Can you have kinetic energy without momentum?
We don't think you can. Here's our reasoning: -- Kinetic energy of an object is [(1/2)(mass)(speed)2]. If kinetic energy is not zero, then mass can't be zero, and speed can't be zero either. -- Momentum of the object is [(mass)(speed)]. If mass isn't zero and speed isn't zero, then momentum isn't zero.
Can an object have a speed of zero and the acceleration not be zero?
Yes, but only at one instant. For instance, if you throw an object straight up, when it reaches the highest point its instantaneous speed is zero, but of course its speed is changing - thus, acceleration is non-zero.
Is it possible for your speed to be zero when your acceleration is not zero?
Yes. Zero acceleration means you are not changing your speed (speed up or slow down) or changing direction. Zero acceleration is a constant speed in a linear direction. A speed implies you are moving.
Can instantaneous speed be negative?
Velocity refers to the rate of change in distance of an object, and also the direction of the change, where speed just refers to the rate of change without regard to the direction, so if the object moved at all, it would have an average speed greater than zero, so No.
Is it possible to have a situation in which the speed of a particle is always zero but the average speed is not zero?
No. If the speed is always zero, then the average of its speed at any two points in time is also zero.
Can particle have zero speed and non zero velocity?
No.
Can the average speed of a body be zero and can the average velocity of a moving body be zero?
Since speed is a scalar quantity, the only way the average speed can be zero is if the instantaneous speed is at all times zero, making it not a moving body, so no on the average speed. The average velocity, on the other hand, can easily be zero. The simplest example is you running in a circle.
Can you have kinetic energy without momentum?
We don't think you can. Here's our reasoning: -- Kinetic energy of an object is [(1/2)(mass)(speed)2]. If kinetic energy is not zero, then mass can't be zero, and speed can't be zero either. -- Momentum of the object is [(mass)(speed)]. If mass isn't zero and speed isn't zero, then momentum isn't zero.
Can an object have a speed of zero and the acceleration not be zero?
Yes, but only at one instant. For instance, if you throw an object straight up, when it reaches the highest point its instantaneous speed is zero, but of course its speed is changing - thus, acceleration is non-zero.
Describe the motion of a bus whose accelaration is zero but the speed is not zero?
It is slowing down. The bus is not picking up speed--accelerating--and its speed isn't zero, as it is not completely stopped. ------------------------------------------------------------------------------------------------------------ The above answer is incorrect as slowing down indicates a negative acceleration not a zero one. The correct answer is that the bus is at a constant speed - any constant speed.
If you flip a coin does its speed ever become zero?
When the coin is at its highest, its speed becomes zero for a 100th of a second.
What is the speed of an echo?
actually an echo does not have any speed . it travels at zero speed
Is it possible for your speed to be zero when your acceleration is not zero?
Yes. Zero acceleration means you are not changing your speed (speed up or slow down) or changing direction. Zero acceleration is a constant speed in a linear direction. A speed implies you are moving.
Can instantaneous speed be negative?
Velocity refers to the rate of change in distance of an object, and also the direction of the change, where speed just refers to the rate of change without regard to the direction, so if the object moved at all, it would have an average speed greater than zero, so No.
How is velocity of zero different from an acceleration of zero?
Velocity basically means how fast you are going. Acceleration means how much your speed is increasing. So if there is zero velocity that means the object is not moving. If there is zero acceleration, that means that the speed is not increasing but there is actual speed and the object is not increasing it's speed what ever that may be.
Is your speed is constant if you are traveling in a straight line with an acceleration of zero?
If your acceleration is zero, then yes, you are traveling at a constant speed. The path does not matter. Acceleration measures the change in velocity, so an acceleration of zero means that there is zero change in velocity and therefore the speed is constant.
