Homework Statement
A mass of 8.50 kg is traveling 7.50 m/s
[up]. It is acted on by a force of 340 N [up]
over a displacement of 15.0 m [up].
What is the change in kinetic energy
Homework Equations
Ek = 1/2mvsquared. F = mv. w = fd
The Attempt at a Solution
I tried doing the...
We round the electronegativity of lithium to 1.0, and bromide to 3.0, so the difference is actually 2.0.
It is also ionic because it is a bond between a metal and non-metal.
Homework Statement
People who are angry sometimes say that the feel as if they will explode. If a calm person with a lung capacity of 3.5L and a body temp of 36C gets angry, what will the volume of the persons lungs be if their temp rises to 39C.
Homework Equations
V1/T1 = v2/T2...
I fixed it, I did use 65m, just forgot to write that in.
I am still getting 46m.
65=7.9t + 1/2a (t)^2
then I use this to solve for t: √2(d) divided by acceleration. Which gets me 3.64s.
Then I do 3.64s * the horizontal velocity which is 12.72 = 46.3 m. Which is still wrong.
Now I'm getting 46m. I do: 65= 7.9(t) + 1/2a (t)^2
And I solve for t.
Then I use the time I found and multiple that by the Vix. And then I get 46.228m, which is wrong.
Physics Projectile Launched at Angle. HELP, TEST TODAY IN 2 HOURS!
Homework Statement
An object is launched from the top of a building
with an initial velocity of 15 m/s [32 degrees]. If the
building is 65.0 m high, how far from the base
of the building will the object land?
Homework...
Homework Statement
A coin tossed straight up into the air takes
2.75 s to go up and down from its initial
release point 1.30 m above the ground.
What is its maximum height?
Homework Equations
The Attempt at a Solution
I seriously have no clue how to do this problem. I...
Just thought about it. Is it because what goes up must come down? So it needs to be 2 times the time, I just calculated for the time to the top of the parabola. Am I right?
Homework Statement
Jumping straight up, how long will a kangaroo remain in the air if it jumps through a height of 3.0m?
Homework Equations
d=vf(t) - 1/2 a (t)2
I Think?
The Attempt at a Solution
Defined all variable
d=3.0 m
a=9.81 m/ss
vf=0m/s2
then:
d=vf(t) - 1/2 a (t)2...
Homework Statement
Some aircraft are capable of accelerations
of magnitude 42.5 m/s2. If an aircraft starts
from rest, how long will it take the aircraft
to travel down the 2.6-km runway?
Homework Equations
d= vi(t) - 1/2 a(t)2
I am assuming that you need to solve for t. I had trouble...