How do you measure an object's speed?

Answer 1

Divide the total distance by the total time to get the average speed.

Or, when you need the speed at a certain time, you can differentiate the fuction of distance(t) over time. This can be compared with dividing the distance (of a really really really short timespan) by the same really really really short timespan)

Answer 2

There are various ways of measuring speed, the simplest is to time the vehicle over a certain distance and then work out the average speed by D/t (D = distance, t = time) Other ways are via a speed or radar gun

Answer 3

Get a Garmin 200W GPS device. Mount it in the car and by the satelite you will know precisely what speed you are travelling. GPS devices are extremely accurate. I used one while traveling from Arizona to Oklahoma and found my car speedo was inaccurate by a few miles per hour, which is normal. This is the best way to measure speed if you have replaced your stock tires with different size tires.

Mark

Or you can do distance divided by time

Liam

Answer 4

There are manySpeed, the magnitude portion of velocity, which is a vector quantity, is measured in many different units. Miles per hour and meters per second are two common ones. But it could be any unit of distance divided by any unit of time. For example, one light-year per millennium is equal to about 670,616 miles per hour. (Note that a light-year is a unit of distance, not time.)

The formula for calculating speed is:

Speed=

Distance

_______

Time

Pronounced: Speed equals Distance over Time!

I hope this is what you needed!

Thank you

Carlotta50

XxX

Answer 5

As speed is displacement per unit of time, measuring the speed of an object requires the measure of its displacement (how far it moved) and the amount of time it took to move that distance. Note that this will give average speed, but will be the actual speed of an object if that object does not slow down or speed up over the interval in which the measurements are taken. This may sound complicated, but it really isn't that bad. Consider land speed records.

When a really, really fast vehicle is checked to find its speed to record land speed records, that vehicle is given a long stretch in which to accelerate. The vehicle then enters the "eyes" of the measuring equipment, and it travels across a fixed distance. The time it takes to make the transit is measured when the "eyes" on the other end record the vehicle's passage. That vehicle has gone a fixed distance and has taken a fixed amount of time to do so. A simple calculation can be performed to find its speed.

Answer 6

You can measure an object's speed by dividing the distance it travels by the time it takes to travel that distance. This will give you the object's average speed over that period. Alternatively, you can use a speedometer or radar gun to measure its instantaneous speed at a specific moment.

Answer 7

You can measure speed in miles per hr (mph) or kilometers per hr.

OR

A way you can measure speed is by using a stop watch so you can tell how long did it take you to run.

Answer 8

Any way you like, but most people stick to kilometres per hour (km/h) or metres per second (m/s).

Answer 9

For the speed of a moving object, you need to know the distance travelled and the time taken.