18,000 meters per hour or 18 km/h .
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It is more usual, scientifically, to express speed in metres per second (m/s, or ms-1) as these are the SI units for distance and time, respectively. It also makes the maths a heck of a lot easier to work out, as you don't need to convert seconds to hours!
100 m in 20 s is the same as 5 m in 1 s (100 / 20 = 5). So the answer is also 5 ms-1
The object is moving at the speed of 50 ms-1 .
320 meters
The average speed is 5 metres per second.
The velocity = (location at 40 seconds - location at 20 seconds)/20 in the direction in which the object is moving.
15 meters north. the object is only moving away from the original starting place. its not like its moving away and then back again.
The object is moving at the speed of 50 ms-1 .
If an object moves 50 meters in 5 seconds, its average speed is 50/5 = 10 meters per second.
320 meters
The object will be moving at 14.7 meters per second. 1.5 seconds X 9.8 meters per second squared(the gravitational constant). This assumes that the object's original velocity is zero.
The average speed is 5 metres per second.
3.00 m/s
The change in distance divided by change in time. So say it moved 10 meters in 5 seconds, it would be 2 meters per second.
The velocity = (location at 40 seconds - location at 20 seconds)/20 in the direction in which the object is moving.
No, it can't. Average VELOCITY can be zero, though.
To determine average speed, you need to know what distance the object traveled in meters over how long it took the object to travel that distance in seconds.
Th eobject traveled 82 meters in 42 seconds, so average speed is 82/42 = m/s = 1.95 m/s
7.5