Answer:
The horizontal component of the truck's velocity is: 23.70 m/s
The vertical component of the truck's velocity is: 3.13 m/s
Explanation:
You have to apply trigonometric identities for a right triangle (because the ramp can be seen as a right triangle where the speed is the hypotenuse), in order to obtain the components of the velocity vector.
The identities are:
Cosα=
Senα=
Where H is the hypotenuse, α is the angle, CA is the adjacent cathetus and CO is the opposite cathetus
The horizontal component of the truck's velocity is:
Let Vx represent it.
In this case, CA=Vx, H=24 and α=7.5 degrees
Vx=(24)Cos(7.5)
Vx=23.79 m/s
The vertical component of the truck's velocity is:
Let Vy represent it.
In this case, CO=Vy, H=24 and α=7.5 degrees
Vy=(24)Sen(7.5)
Vy=3.13 m/s
Answer:
Explanation:
As we know that initial angular speed of the tub was zero and then it increases uniformly to 4 rev/s in t = 6.00 s
so we will have
Now when the tub will comes to rest uniformly after opening the lid in time interval of t = 15 s
then we have
Now total angular displacement of the tub is given as
so number of revolutions is given as
Salt is a compound, with the chemical name "Sodium chloride"
and the chemical formula NaCl.
Each molecule of salt is an atom of sodium electrically bound to
an atom of chlorine.
The chemical properties of salt are completely different from the
chemical properties of either element in its molecule. In fact,
sodium and chlorine are both toxic and corrosive, i.e., poison,
but as long as the salt is still salt, you can safely eat it !
There's nothing physical or mechanical, like spinning or filtering,
that you can do to salt to separate the sodium from the chlorine.
That takes electrical or chemical processes, and once you separate
them, you wind up with two substances that are both dangerous.
If you put salt into a jar with some sand and shake it up, then you
have a mixture. The salt is still salt and the sand is still sand, and
they can be separated quite easily.
If you put some salt in some water, and stir it up so that the salt
dissolves, then you have a salt solution. Some of the salt
molecules actually come apart in it, and there are sodium ions
and chlorine ions in the water. When that happens, the water
begins to conduct electric current very nicely, and if you DO
pass current through it, you get sodium collecting at the end
of one wire, and chlorine collecting at the other wire. But if you
just let it set there in the sun, or heat the solution on the stove,
then once the water evaporates, you have plain old salt again
in the jar.
Perspective is the evaluation or analysis of something, the way we think.
perception is a way of interpreting and understanding something.
initial velocity = 0 = v₍i₎
final velocity = ? = v₍f₎
t = 12 sec
Acceleration = 4m/s²
First we have to find the distance d, for this we use the
formula,
D = v₍i₎t + 1/2at²
D = 0(12) + ½ (4)(12)²
Distance = d = 288 m
Now to find the Vf use the formula,
V₍f₎² = v₍i₎² + 2ad
V₍f₎² = (0)2 + 2(4)(288)
V₍f₎² = 2304
V₍f₎ = 48 m/s
so the velocity at the end of 12 sec is 48 m/s