AboutScotto Expertise Any kind of mathematics (algebra, geometry, trigonometry, matrices, calculus, linear approximation, linear regression, linear programming, numerical analysis, probability, statistics, etc.). I also have answered some questions in Physics, Chemistry, and Biology. I would like to volunteer in all areas of Mathematics, not just calculus, and the other three courses that were mentioned.
Experience Experience in the area: I have tutored students in all areas of mathematics for over 20 years.
Education/Credentials: BSand MS in Mathematics from Oregon State University, where I completed sophomore course in Physics and Chemistry. I received both degrees with high honors.
Awards and Honors: I have passed Actuarial tests 100, 110, and 135.
Question I dont know if this is your field but if you could help me at all Id really appreciate it.
A object is projected upwards from a 20m tower. If it takes 4.5 seconds for the object to hit the ground, what is the initial velocity of the object?
I cant figure out the initial velocity becuase I only have acceleration (gravity) and the total time.
Can you please help?
Answer Maybe I should put in there I know some physics and some chemistry as well (since I do).
The basic equation for height h = d0 + v0(t) - 0.5a*t^2 where d0 is the original height, v0 is the original speed, and a is the acceleration due to gravity.
Note that all of the values are in meters.
Plugging in the values given, we know that d0 = 20, v0 is unknown,
a = 9.8m/s^2, and the final height is 0.
Put 4.5 in for t into the h equation and v0 can be found by solving the equation -4.9*(4.5)^2 + 4.5v0 + 20 = 0.
