An object is dropped from the top of a 100-m tower. Its height above ground after t sec is 100 - 4.9t² m. How fast is it falling 2 sec after it is dropped?
An object is dropped from the top of a 100-m tower. Its height above ground after t sec is 100 - 4.9t² m. How fast is it falling 2 sec after it is dropped?