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anonymous
 one year ago
PLEASE HELP!!!
If a baseball player hits a baseball from 4 feet off the ground with an initial velocity of 64 feet per second, how long will it take the baseball to hit the ground?
anonymous
 one year ago
PLEASE HELP!!! If a baseball player hits a baseball from 4 feet off the ground with an initial velocity of 64 feet per second, how long will it take the baseball to hit the ground?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i thought it was easy 4th grade math sorry i'm a 6th grader.

DDCamp
 one year ago
Best ResponseYou've already chosen the best response.1You can use the equation: \[y = y_{initial} + v_{initial}\times t  16 \times t^2 \] to find the height of the ball after t seconds. Solve the equation for y=0 and you'll get the time where the height is 0 (i.e. its on the ground)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How come the direction of acceleration is not specified? You would need to identify the horizontal velocity and vertical velocity separately to know when exactly the ball will hit the ground.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the answer is \[2 \pm \sqrt{17}/2 \] ?

DDCamp
 one year ago
Best ResponseYou've already chosen the best response.1@Robert136 The question doesn't ask where, just when.

DDCamp
 one year ago
Best ResponseYou've already chosen the best response.1@RosieF The quadratic equation gives you two answers, because the graph of that function would look something like this:dw:1439947696260:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0When the ball makes contact with ground is dependent on the direction of the hit. I get that the ball was hit at 4 feet with an initial veocity of 64f/s, however you would need to consider acceleration due to gravity with regards to the direction of velocity.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How can you even assume that the ball follows pattern of hyperbola without being explicitly stated as so?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0This question would be invalid in Newtonian mechanics.

DDCamp
 one year ago
Best ResponseYou've already chosen the best response.1Because I have a degree in physics...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Then you must also know that the velocity is a vector value.

DDCamp
 one year ago
Best ResponseYou've already chosen the best response.1From the information we're given, the best assumption is that the problem meant a vertical velocity of 64 ft/s. The horizontal velocity is irrelevant.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Usually angle is stated to the horizontal

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can you just tell me if the answer that I got was right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0There is no right answer to this question as too much assumption is involved.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0well is my answer hypothetically right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0However for grade 10 math I would stick with that assumption that velocity was meant to the vertical. For in grade 10 math you cover parabola.
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