67.10809 miles/hour
108 km /hour
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The acceleration is expressed in meters per second square, which really means (meters / second) / second. Every second, the skydiver will be 10 meters per second faster than the previous second. Therefore, after 3 seconds, he will have a speed of 30 meters per second.
(10 - 30)/4 = -5.0 meters per second per second (which can be written also as meters per second squared).
30 meters per second is faster than 1 mile per minute. 30 meters per second is about 67.1 mph. A mile per minute is 60 mph.
30 mph is 13.4112 meters per second Stop posting homework assignments.
30 metres per second