Answer:
Time elapsed = 2.856
SECOND ROCK HAS FASTER SPEED
Explanation:
This can be achieved in 2 ways, and it is clear from the careful study that the travel time is attributed to the time required to cross the path above the bridge by the 2nd stone i.e.
14 = 9.8 * t
t = 1.428 sec and
time between 2 splash = 2 * 1.428 = 2. 857 sec
2nd way
let time for 1st spalsh be t and
second splash be t1.
from equation of motion
so 60 = 14t + 0.5 * 9.8 * t * t
4.9 t^2 + 14t -60 = 0
On solving, we get t = 2.351 sec
for t_1, we have some extra time, which can be divided into t2 and t3.
14 = 9.8 * t2
t2 = 1.428 sec
total time taken by 2 is
T = 1.428 + 1.428 + 2.351
so we get t_1 = 5.207 sec
time elapsed is = T - t
= 5.207 - 2.351
Time elapsed = 2.856
SECOND ROCK HAS FASTER SPEED
Answer:
it wont fly away
Explanation:
depending how tight the knott and find it is going to be stuck to the pole
Answer is miles sir your welcome it was simple
Answer:
There are 157 ft. above the bottom of the gorge
Explanation:
Cliff 1 (h) = 172ft.
Cliff 2(h) = 112 ft
Height difference between the cliffs: 172ft. -112 ft. = 60 ft
Width of the gorge = 80 ft
In this problem a right triangle is formed where the hypotenuse (T) is represented by the trestle's length, the width of the gorge is one of the legs and the leg opposite the angle (Ф) is represented by the difference in height between the cliffs.
T=
3/4 T = 3/4(100) = 75ft.
Calculating the height of the train from the lowest cliff, we will use the proportion of the sine of the angle that forms the trestle with the horizontal.
sin(Ф)=
x=
In order to know the height from the bottom of the cliff, we must add its height to this value.
h= 45ft. + 112ft. = 157 ft.
The Benefit of Fossil Fuel Consumption among the Given Options is :
B. Cheap Energy
<u>Because</u> :
✿ Fossil Fuels are Non - Renewable.
✿ They result in High Pollution and Greenhouse Gases.