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daser333 [38]
3 years ago
13

Can someone please answer all parts?? Extra points for this one!

Mathematics
2 answers:
Ganezh [65]3 years ago
3 0
     <span>a) 
Acceleration of stone = 10 

Integrate: 
So velocity = 10t 

Integrate again: 
So distance from starting point = 5t^2 

Distance from ground = 450-5t^2 

b) 
450 - 5t^2 = 0 


9.48 seconds 

c) velocity = 10t 

Put the time into this to give: 

94.8 m/s 

d. 

Velocity = 10t + 5 

Integrate again: 

5t^2 + 5t 


Solve 
5t^2 + 5t = 450 

Gives 9 seconds</span>
Phoenix [80]3 years ago
3 0
The velocity is 0t, here's how I got this answer

To find Velocity you must do dv/dt, so in this case it would look like this:

DV/DT = -9.8 which also equals V = -9.8t + C so in this case the Velocity would be 0 because -9.8 - (-9.8) = 0
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Answer:

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Step-by-step explanation:

If we were to consider the height of this triangle EFG, it would be 4 units of length, supposedly splitting base GF into two ≅ parts, each 2 units of length. First let us name the point drawn to base GF ⇒ point H, so that the height of Δ EFG ⇒ EH. Now as EH splits GF into two ≅ parts, by Converse to Coincidence Theorem, Δ EFG ⇒ Isosceles Δ;

EH and FH are legs of a right triangle EFH, so that Pythagorean Theorem can be applied to solve for the length of EF and EG, knowing that as Δ EFG ⇒ Isosceles Δ, EF ≅ EG;

( EH )^2 + ( FH )^2 = ( EF )^2,

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( EF )^2 = 20 ⇒ take square root on either side to solve for EF,

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