<span>If "m" balls are thrown per second, the time taken for a ball to reach its maximum height will be 1/m seconds. How to get this? See that the next ball is thrown only when the previous ball reaches its maximum height. If 'm' balls were thrown in 1 second this means that each ball was attaining its maximum ht in 1/m seconds.
This was the main part. Now we can proceed to find maximum height in 2 ways-
a)
We know for upward journey ,
t=1/m
a=-g
v=u-gt
final velocity ,v = 0 (at highest point)
u
=gt = g/m
Now we can apply
h=ut-1/2 gt^2
Putting the values of u,t, we will get
h= g/2m^2
b)
The second method uses a trick that time taken to reach the maximum ht is same as time taken to fall down.
So, we will now consider the downward journey of ball which also takes 1/m seconds
We apply
h=ut+1/2gt^2
Here u=0 ,t=1/m
We will again get ,
h=g/2m^2</span>
Answer:
i dont know but what i could say is you could go on and ask the question and it would help you
Explanation:
Answer:
-34.3m/s
Explanation:
first lets find the time befor it hit the ground by using free fall equation and we know we use that in one condition which is a constant acceleration in this case its a gravitational acceleration which is -9.8
![h = \frac{1}{2} g {t}^{2}](https://tex.z-dn.net/?f=h%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20g%20%7Bt%7D%5E%7B2%7D%20)
![t = \sqrt{ \frac{2 \times 60}{9.8 } } = 3.5s](https://tex.z-dn.net/?f=t%20%3D%20%20%20%5Csqrt%7B%20%5Cfrac%7B2%20%5Ctimes%2060%7D%7B9.8%20%7D%20%7D%20%20%20%3D%203.5s)
now we know that the initial velocity its zero :
so applu the another kinematic equation which is
![v = u - gt](https://tex.z-dn.net/?f=v%20%3D%20u%20-%20gt)
v is final velocity and u is the initial velocity and its equal zero.
v = - 9.8 × 3.5 = - 34.3
As we move above up from one trophic level to another in
an energy pyramid, what happens to the energy?
a. It decreases from one trophic level to another.
b. It remains the same for each trophic level.
c. It increases from one trophic level to another.
As we move above up from one trophic level to another in
an energy pyramid, the energy level decreases from one trophic level to
another. The answer is letter A.
Answer:
50m [N]
Explanation:
Think of these directions as if they were on a 2D plane. (if you're talking about displacement)
If you go 32m [N] then 6m [S], it's like you're moving backwards (-). (thus, 32n-6s=26m [N])
Next, you go north again, so moving forwards (+). (thus, 26n+24n=50m [N])