The metallic elements which all react to water are found in the same group, the groups name is the Alkali metals, or also known as group one.
Answer:
- Potential Energy = mgl (1 - cosθ)
Explanation:
<h3>Given :-</h3>
- Mass of stick = m
- Length of stick = l
- Angle = θ
<h3>To Find :-</h3>
- Increase potential energy
<h3>Solution :-</h3>
✪ <u>According to the given </u><u>data</u> :-
⠀⠀⠀→ cosθ = ᵇ/ₕ
⠀⠀⠀→ cosθ = ᴬᴮ/l
⠀⠀⠀→ AB = l cosθ
❂ <u>For </u><u>Height</u> :-
⠀⠀⠀→ h = l - l cosθ
⠀⠀⠀→ h = l (1-cosθ)
☯ <u>As we know that</u>
⠀⠀⠀→ Potential Energy = mgh
⠀⠀⠀→ Potential Energy = mg × l (1-cosθ)
⠀⠀⠀→ Potential Energy = mgl (1-cosθ)
It's easy to roll the the basket ball than bowling ball
It is because bowling ball is solid spherical ball which will have less moment of inertia
its moment of inertia is given as
While for the hollow ball like basketball we know that moment of inertia is given as
so here we can see for the same mass if we take basketball then its moment of inertia is more so it is easy to roll basket ball then to roll bowling ball.
So it is easy to roll basket ball then rolling ball
Answer:
16.8 seconds
Explanation:
Given that:
Constant speed of rabbit = 4.2 m/s
Initial Velocity (u) of cat = 0
Acceleration (a) of cat = 0.5 m/s²
Time it takes cat to catch rabbit ;
Using the relation:
Distance moved by rabbit (Dr) :
Dr = speed * time ; Dr = 4.2t
Distance moved by Cat (Dc) :
Dc = ut + 0.5at^2
Dc = 0 + 0.5at^2
Hence, Cat will catch rabbit when Dr = Dc
4.2t = 0.5at^2
4.2t = 0.5(0.5)t^2
4.2t = 0.25t^2
Divide both sides by t
4.2 = 0.25t
t = 4.2 / 0.25
t = 16.8 seconds
Hence, the cat will catch the rabbit after 16.8 seconds
Answer:
4 electric pole is the answer.
