Answer:
6.3
Step-by-step explanation:
The rocket hits the ground at the same speed it left, only the velocity is downward, rather than upward. That is, the change in velocity is from +100 ft/s to -100 ft/s, a total change of 200 ft/s. The change in velocity is brought about by the acceleration due to gravity, 32 ft/s/s. The time required for the observed change in velocity is ...
(200 ft/s)/(32 ft/s²) = 6.25 s
Rounded to tenths, it takes the rocket 6.3 seconds to hit the ground.
_____
The equation for the ballistic motion of the rocket is ...
h(t) = -1/2·gt² +v0·t
where g is 32 ft/s² and v0 is 100 ft/s. A graph of this equation shows the rocket hits the ground at 6.25 seconds, as above.
The correct answer is :False
Answer:
13ft, the pole is 9 ft but since the rope is 4 feet from the tent, the rope should be longer than the 9 ft pole. but 9+4= 13ft
Step-by-step explanation:
Answer:
The area of square in terms of x = 16x² -24x + 9
Step-by-step explanation:
It is stated in the question that the length of a square = 4x - 3
Formula to find the area of the square is
Area = length²
Area = ( 4x - 3 )²
by using ( a - b )² = a² + b² - 2ab
here a = 4x and b = -3
So,
(4x)² + (-3)² - 2(4x)(3)
16x² + 9 - 2(12x)
16x² + 9 - 24x
16x² -24x + 9
The area of square in terms of x = 16x² -24x + 9