A 0.4 kg ball is thrown vertically. If the ball reaches a maximum height of 1.54 m, please find:
a. The initial velocity of the ball.
b. The time it took for the ball to reach the maximal height.
c. How long does it take for the ball to return to its starting position?
Xf=Xo+Vot+.5at^2
Does this type of knowledge help you in real life? It's very unlikely. Just skip the question because it doesn't really prepare you for the real world.
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a) the ball's initial velocity is going to be the same as its velocity when it returns to its starting position if you dropped it from 1.54m. For this I would simply use v^2 = 2ax, where "a" is the acceleration of gravity, 9.8m/s^2.
b) Use the numbers you now have and just plug them into x = 1/2at^2 and solve for "t".
c) It takes the ball the exact same amount of time to fall to its initial position as it took to rise to its maximum position, so this will just be double whatever your answer to question (b) was.
Honestly man, all you have to do is look up your equations for distance, velocity, etc. I would guess if your homework involves this sort of thing, you've probably been given them. All you have to do is put in your numbers and plug and chug. It's simple algebra.
fdkjasd wrote:
Does this type of knowledge help you in real life? It's very unlikely. Just skip the question because it doesn't really prepare you for the real world.
Knowledge of the answers to the question won't prepare you for the real world, but acquiring the skills to solve the problem certainly will.
a) Vo=(2gd)^.5
b) t=((2d)/vo)
c) 2t
Can't remember all the exact equations for that stuff, but the weight of the ball will not matter to any of the answers. And the answer to c will be the answer to b times two.
/*** ASS MODE: ON ***/
Also, the question doesn't specify if it's an earth question so we don't know the acceleration due to gravity. And we need to know at what altitude this will take place, as this will effect the outcome if you are looking for a precise answer accurate to many decimal places.
/*** ASS MODE: OFF ***/
Wheeee, that was fun.
fdkjasd wrote:
Does this type of knowledge help you in real life? It's very unlikely. Just skip the question because it doesn't really prepare you for the real world.
The question is not about knowledge. It is about analytical skills. I believe the skill of accurate analysis has value in the real world.
Of course, since the OP is approaching the question as a matter of knowledge, he or she is doomed to struggle this semester in physics. Sorry kiddo.
thinking > knowledge wrote:
fdkjasd wrote:Does this type of knowledge help you in real life? It's very unlikely. Just skip the question because it doesn't really prepare you for the real world.
The question is not about knowledge. It is about analytical skills. I believe the skill of accurate analysis has value in the real world.
Of course, since the OP is approaching the question as a matter of knowledge, he or she is doomed to struggle this semester in physics. Sorry kiddo.
I kind of agree. This is such a basic problem, that OP really needs to figure this out on his(her) own. There are an infinite number of similar problems that one could ask. You've got to get to the root of how to attack these types of problems.
fdkjasd wrote:
Does this type of knowledge help you in real life? It's very unlikely. Just skip the question because it doesn't really prepare you for the real world.
It helped me graduate college and get paid-well. So yes, it does help in the real world.