D. Screw is the answer to your question
Ek = (m*V^2) / 2 where m is mass and V is speed, then we can take this equation and manipulate it a little to isolate the speed.
Ek = mv^2 / 2 — multiply both sides by 2
2Ek = mv^2 — divide both sides by m
2Ek / m = V^2 — switch sides
V^2 = 2Ek / m — plug in values
V^2 = 2*30J / 34kg
V^2 = 60J/34kg
V^2 = 1.76 m/s — sqrt of both sides
V = sqrt(1.76)
V = 1.32m/s (roughly)
The statement above is TRUE.
When analyzing forces it is permitted to break the motion and forces into horizontal and vertical components. This is especially true for two dimensional projectile motion, in order to simplify the calculation, the forces and the motion has to be broken down into horizontal and vertical components. The vertical component is affected by the force of gravity while the horizontal component is not affected by gravity for short displacements. With greater displacement, the force of gravity comes into play.
Answer:
A force has both magnitude and direction, therefore: Force is a vector quantity; its units are newtons, N. Forces can cause motion; alternatively forces can act to keep (an) object(s) at rest. ... Consider two forces of magnitudes 5 N and 7 N acting on a particle, with an angle of 90◦ between them.
Explanation:
from google
Answer:
See the explanation below
Explanation:
The speed of sound waves can be calculated using the following equation:
![v_{s}=\sqrt{\frac{E}{ro} } \\where:\\E = Young's modulus [GPa]\\ro = density of the material [kg/m^3]](https://tex.z-dn.net/?f=v_%7Bs%7D%3D%5Csqrt%7B%5Cfrac%7BE%7D%7Bro%7D%20%7D%20%5C%5Cwhere%3A%5C%5CE%20%3D%20Young%27s%20modulus%20%5BGPa%5D%5C%5Cro%20%3D%20density%20of%20the%20material%20%5Bkg%2Fm%5E3%5D)
Let's do the exercise of comparing two materials one denser than the other, as is steel and aluminum
ro_steel = 7500 [kg/m^3]
ro_aluminum = 2700 [kg/m^3]
E_steel = 200 [GPa]
E_aluminum = 70 [GPa]
Now replacing the values in the equation for each material.
![v_{steel}=\sqrt{\frac{200*10^9}{7500}}\\ v_{steel}=5163[m/s]](https://tex.z-dn.net/?f=v_%7Bsteel%7D%3D%5Csqrt%7B%5Cfrac%7B200%2A10%5E9%7D%7B7500%7D%7D%5C%5C%20v_%7Bsteel%7D%3D5163%5Bm%2Fs%5D)
And for the aluminum
![v_{aluminum}=\sqrt{\frac{70*10^9}{2700} }\\ v_{aluminum}=5091.75[m/s]](https://tex.z-dn.net/?f=v_%7Baluminum%7D%3D%5Csqrt%7B%5Cfrac%7B70%2A10%5E9%7D%7B2700%7D%20%7D%5C%5C%20v_%7Baluminum%7D%3D5091.75%5Bm%2Fs%5D)
In this way we can see that sound propagates faster in denser materials.
