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If your speed was 30 miles an hour and you sped up 50 miles and hour in 20 seconds. What was your acceleration?
Acceleration = (change in speed) / (time interval)= (50 - 30) mph / 20 sec = (20 mi/hr) (1/3,600 hr/sec) (5,280 ft/mi) / (20 sec)= (20 x 5,280) / (3,600 x 20) (mi - hr - ft / hr - sec - mi - sec)= 1.4667 ft/sec2 (rounded, repeating)
The speed of a moving walk way is typically about 2.5ft per sec Walking on such a moving walkway it takes Karen a total of 40 sec to travel 50ft with the movement of the walkway and back again against?
Oh, dude, Karen's like the queen of efficiency, huh? So, if she's cruising along at 2.5ft per sec, it'll take her 20 sec to cover the 50ft with the walkway and another 20 sec to come back against it. That's like the speed of light in airport terms, man.
How far does a car travel when moving 20 mph for 12 second?
(20 mi / hr) x (12 sec) x (5,280 ft / mi) x (1 hr / 3600 sec)= (20 x 12 x 5,280 / 3,600) (mi - sec - ft - hr / hr - mi - sec)= 352 ft
Suppose a rock is dropped off a cliff with an initial speed of 0 miles per second What is the rocks speed after 3 seconds in miles per second if it encounters no air resistance?
The acceleration of gravity is 32.1 ft/sec2 .After 3 seconds, the rock's downward speed is (3 x 32.1) = 96.3 ft/sec.(96.3 ft/sec) x (1 mi / 5,280 ft) = (96.3 / 5,280) (ft - mi / sec - ft) = 0.0182 mile/sec (rounded)
How long does it take to travel 205 feet at 6 mph?
First change mi/hr into ft/sec. There 1 mi = 5280 ft and 1 hour = 3600 sec. 6 mi/hr = 6 * (5280 ft / 3600 sec) = 8.8 ft / sec To figure out how fast you travel any distance you divide the distance by time it took you. distance / time = speed 205 ft / time = 8.8 ft / sec Solving for time: time = 205 ft / (8.8 ft / sec) time = 23 sec
