you should really show some work before asking for help and yes this is a really easy one.
HINT: finding the time the ball is in the air is key to calculating the range.
the equation e = mc^2 is a fundamental relation between mass and energy. A particle of mass m has an "intrinsic rest energy" Eo given by Eo = mc^2
im not 100% on the way that they derived k = 1/2 mv^2 but i do know that its only used when relating mass velocity and kinetic energy.
the Eo...
hey I've been trying this problem and any way i try i always seem to not have enough info i think I am missing a keyconcept to help get more info outa the problem, well ne way here is the question
Q: A uniform ladder rests against a frictionless vertical wall. the coefficient of static...
ok i think i have it now
Kf + Uf = Ki + Ui
0 [because its a minimum velocity] + ( -G Me m / Re +800km ) [potential at 800km] = 1/2 m v^2 + ( -G Me m / Re ) [potential at the begining, the surface of the earth]
then through some algebra we can solve for v
2 [...
Potential energy [U] is the energy a mass has at rest, potentially it could fall and turn that energy into kinetic energy. change in U is = change in K [conservation of energy] U doesn't even care about any angles because there is no angle involved with a rock sitting in one place.
Q: In the absenceof air resistance, the least speed with which a body must be projected vertically upward from the Earth's surface if it is to reach an altitude of 800km is...
800km = 8.00x10^5 m
radius of Earth = 6.37x10^6 m
mass of Earth = 5.99x10^24 kg
Kf +Uf = Ki + Ui
0 + 0 = 1/2...
hi I've been looking at this problem for hours and I am not sure if I am approaching it right.
Q: The boom in the figure [check attachment] is uniform and weighs 2.20kN. The magnitude of the force exerted on the boom by the hinge is...
i knowthe boom has a mass of 224.261 kg, and...
hi i was wondering if i did this correctly.
Q: A wire 2.5m long has a cross-sectional area of 2.5 mm^2. It is hung vertically and a 4.5 kg mass is hungfrom it. Byhow much does the wire stretch if Young's modulus for that material is 2.0 x 10^11 N/m^2 ?
so i did Y = ( F / A ) / ( del L / L...
my answer: if you don't take the words too literally you'll see that it is an egg. there is no manufactured "lid" to this container and also the yolk has a "golden" color and could be valuable to some one whos hungry or an animal of some sort. forget where heard this but i thought it was kinda...
interesting viewbut saying "but wait, perhaps its true (or false) in my opinion." could be considered a second statement perhaps as lovers of logic they would intuatively come to this assumption but I am not personal friends with the cannibals so i wouldn't know :)
you are lost in a blizzard. you are traveling in a straight line and you happen to come across a cabin. seeing as how the blizzard has been raging for several days you decide to seek refuge in the cabin. you open the door and walk inside, and there are no lights on inside. closing the door...