Answer:
14.7 m/s
Explanation:
Since the motion of the ball is a uniformly accelerated motion, we can find the initial speed by using the following suvat equation:
where
s is the vertical displacement
u is the initial velocity
t is the time
a is the acceleration
In this problem, we have:
s = 0 (because at the end of the motion, the ball returns to its original position)
u = ?
is the acceleration of gravity (negative because it is downward)
is the total time of flight
Solving for u, we find the initial velocity of the ball:
![0=ut+\frac{1}{2}at^2\\u=-\frac{1}{2}at=-\frac{1}{2}(-9.8)(3)=14.7 m/s](https://tex.z-dn.net/?f=0%3Dut%2B%5Cfrac%7B1%7D%7B2%7Dat%5E2%5C%5Cu%3D-%5Cfrac%7B1%7D%7B2%7Dat%3D-%5Cfrac%7B1%7D%7B2%7D%28-9.8%29%283%29%3D14.7%20m%2Fs)
Gold is metallic, with a yellow color when in a mass, but
when excellently separated it may be black, ruby, or purple. Your density
numbers have no units, so they are unusable.
If the numbers you give match to the densities of the given
metal in g/ml or kg/L, it should be gold.
Density = mass/volume, so:
96.5g/5ml = 19.3 g/ml. So the answer is 19.3 gold.
You are looking to find gravitational energy, the formula for that is (height)(weight)(acceleration due to gravity). In your case I️t will be (3)(2)(9.8)= 58.8 Joules
webpage of a scientist who is trying to sell a new invention
trying to dell = vested interest.
umiversity should be objective impartial
I believe it she should use the first aid kit next