Halp!!!!

With what velocity must an object be thrown upward from the ground to reach a maximum height of 550 feet?

300kb/s

>>1
IMPERIALIST

>>1
p.s. this is high school level physics, retard

1.21 jiggawatts

v^2 = u^2+2as

(v^2)/2 = gh (conservation of energy, divided out common factor of mass)

what is the mass of the object? idiot.

>>8
ahahaha
oh wow

just strap a rocket to it - guaranteed 1000ft

>>8
We're assuming an object whose mass << that of the earth.  Therefore, we can neglect gravitational perturbations on earth's location.

Because things that go up generally go down, a parabola will be helpful for you to figure this out.

idiots, all of you. except >>6 and >>7, who already gave the answer.

The formula you want is v^2 = u^2 + 2as. u=0, a=g, s=550 feet=167.64 meters (stupid fucking imperial system)

v = sqrt(2*9.8m/s*167.64m) = 57.32 m/s = 128 mph

>>13
>>13
Yes, on the assumption that the object is of negligible mass compared to the earth, the absence of air resistance and wind, and the change in gravitational pull is negligible at 550feet as compared to that of sea level.

>>13

I'm gonna have to say no. u is not 0, u is what you want to find. You're trying to find the initial speed vertically upwards to travel s=167.64. v may be 0, but we don't know that, all we know is that v >= 0 at s=167.64. Also, you had a=g and then s > 0, when in fact if a > 0 then you need to stipulate that s < 0, since you're working in the downward direction. What you ACTUALLY wanted was a = -g UPWARDS.

Where do you morons come from?

>>15
lulz.

v^2=u^2+2as.
Taking direction upward as positive,
s = +167.64m
a = -9.81m/s^2
v = 0m/s
Problem solved.

v of course will be zero since it is at maximum height. Suppose v is positive it means it'll go higher than 167.64 meters which means 167.64 meters is not its maximum height, which means you aren't answering the question.

You could also consider the object at maximum height falling (from rest) the same distance.  How fast it hits the ground is the answer you want.

With down as the + direction, >>13's answer is still right.

Don't call me gay, but I need some mary jay!

Marijuana MUST be legalized.