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Does the speed limit sign refer to average or instantaneous speed?
Wiki User
∙ 8y ago
Probably determined by the method used for enforcement. It refers to the speed you are going when the radar gun pings you (instantaneous speed) or the time it takes to cover a predetermined distance from an aircraft (average speed).
The above refers to enforcement, as indicated. And it is correct. As regards enforcement. The to the question is that the speed limit sign refers to the maximum instantaneous speed at any point in your travels on a roadway that is so marked.
Wiki User
∙ 8y ago
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Does light speed accelerate or is it instantaneous velocity?
Instantaneous.
When is speed equal to the magnitude of velocity?
That is the case when you are talking about instantaneous speed and velocity - or when the velocity is constant. In the case of an average speed and velocity, this relation does not hold.
How is speed calculate?
Average speed is calculated by dividing the total distance covered divided by the time taken. Instantaneous speed is calculated as the derivative of displacement with respect to time.
What does the slope of the instantaneous speed-vs-time graph represented?
Instantaneous acceleration.
Is the average speed equal to the magnitude of the average velocity justify your answer?
Yes usually and no rarely, velocity is defined as a vector, having both a direction and a magnitude (which is speed in the case of velocity). For instance 100 mph (speed) east (0o) (direction). In this form it is easy to see that the magnitude is 100 mph but mathematically to determine the magnitude of a vector you would divide the vector by its direction. 100 mph 0o / 0o = 100 mph Average speed and average velocity share the same relationship as instantaneous speed and instantaneous velocity so divide out the average direction from your average velocity to determine your average speed. If this is over a time period and you know the beginning and ending places in space your averages will simply be the difference from the starting to the ending places. So yes so long as you define speed to actually be the magnitude of the vector. However, if speed is taken without direction over time it may become something different. If an object travels along a vector with a negative magnitude its speed will not be negative but its vector magnitude will. Ex: A car travelling in reverse still has a positive speed but a compass will show it to be heading in the opposite direction of travel, a negative vector value...
How is instantaneous speed different from average?
The average speed is the speed that it takes to travel a certain distance in a certain time. Average speed is determined by dividing the distance traveled by the time taken to get there. Instantaneous speed is a certain speed at any given time.
Does the speedometer of a car read average speed or instantaneous speed?
instantaneous speed
Does the speedometer on a vehicle show the average speed or instantaneous speed?
instantaneous speed.
To justify with calculation average speed is equal to instantaneous speed?
Only if speed is constant. There can be no acceleration if the average speed is equal to the instantaneous speed.
Is a car's speedometer show instantaneous speed average speed or velocity?
It shows instantaneous speed.
What is the difference between instantaneous speed and speed?
Instantaneous speed is speed measured at a specific time. Speed is an average.
What is the difference between instantaneous speed and average speed?
Instantaneous speed is the speed at a particular moment in time.The average speed of an object tells you the (average) rate at which it covers distance
How are average speed and instantaneous speed alike?
Average speed and instantaneous speed are both measurements of the speed of an object. The instantaneous speed measures how fast the object is going at a particular moment, while average speed shows how fast the object was moving in total over time.
What do you mean by instantaneous speed?
Instantaneous speed is the speed of a body at any one instant. There is really no such thing as the instantaneous speed, it is merely the average speed over a very short space of time.
Can instantaneous speed and average speed ever be different for a moving object?
Of course. When you're driving on the Interstate and you see a State Police cruiser coming up behind you, you stomp the brake and slow way down to the speed limit. Now your instantaneous speed is only the speed limit. You feel like you're crawling, you can't stand it, and as soon as you're sure he can't see you and doesn't care, you let your car come back up to normal speed again. Your average speed for the trip, or for any whole hour that includes that little episode, is comfortably in excess of the limit, although your instantaneous speed at any instant during those few minutes was exactly the posted limit.
Why do you use average speed?
The concept of average speed is somewhat simpler than "instantaneous speed".
What is the same instantanoeus speed and average speed?
different on constant and instantaneous speed
