[Video] Q10: 1/2mv^2 = mghtorricelli's law is given by the equation above, where m represents the mass, h represents the height, v represents the velocity, and g is a constant. according to the equation from torricelli's law, which of the following is equivalent to the velocity, v ?

Explanation for Question 10 From the Math (No Calc) Section on the 2019 April Sat

In number 10, we are given towards Sally's law, 2 which is one half MV squared equals MGH. 3 And then it starts defining the variables. 4 Then we get to the question part, which is asking according to the equation 5 from Torah Sally's law, which of the following is equivalent to the velocity V. 6 So this entire word problem is basically asking what is the equal to, 7 and to find that you just have to isolate this V right there. 8 So I'm going to go ahead and rewrite it down here. 9 Okay. Now the first step we can get rid of em on both sides, 10 but dividing both sides by M that'll cancel 11 it out. Then that gives us one half B squared 12 equals G times H. 13 Now here's our V the next step to getting it alone. 14 We can get rid of that one half by multiplying both sides by two, 15 that gets rid of that leaves you with B squared equals two 16 G H, and then finally, 17 to get the alone, you can take the square root of both sides. 18 So that'll leave you with B equals the square root of two G 19 H, which is C.