Well, isn't that just a happy little question! To find the acceleration between 20 seconds and 30 seconds, you would need to calculate the change in velocity during that time interval and divide it by the time taken. Remember, acceleration is how quickly an object's velocity is changing over time. Just like adding a touch of bright color to a painting, understanding acceleration can add a beautiful depth to your knowledge of motion.
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Oh, dude, acceleration is just the rate of change of velocity over time, so you'd just calculate the difference in velocity at 20 seconds and 30 seconds, then divide by the time interval. It's like the speedometer in your car, but fancier. So, the acceleration between 20 sec and 30 sec is just the change in velocity divided by 10 seconds. Easy peasy!
As there is no unit of anything, this is an unsolvable question.
Remember:
Gravity is -4.9t^2 meters per second.
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)
Acceleration = (change in speed) / (change in time) = (30 m/s) / (10 sec) = 3 meters per second2
25 is exactly between 20 and 30.
1 min = 60 sec 30 min = 1800 sec
Probably 'between 20 and 30.'