Answer:
20 m/s
Explanation:
The force experienced by a charged particle in an electric field is given by
![F=qE](https://tex.z-dn.net/?f=F%3DqE)
where, in this problem:
is the charge of the particle
E is the electric field
The electric field here has components:
![E_x=-2.5 N/C\\E_y=0\\E_z=0](https://tex.z-dn.net/?f=E_x%3D-2.5%20N%2FC%5C%5CE_y%3D0%5C%5CE_z%3D0)
So the components of the force experienced by the particle are:
![F_x=qE_x=(0.080)(-2.5)=-0.2 N\\F_y=0\\F_z=0](https://tex.z-dn.net/?f=F_x%3DqE_x%3D%280.080%29%28-2.5%29%3D-0.2%20N%5C%5CF_y%3D0%5C%5CF_z%3D0)
Now we can find the components of the acceleration experienced by the particle, using Newton's second law of motion:
![a=\frac{F}{m}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7BF%7D%7Bm%7D)
where
m = 4.0 g = 0.004 kg is the mass of the particle
The 3 components of the acceleration are:
![a_x=\frac{F_x}{m}=\frac{-0.2}{0.004}=-50 m/s^2\\a_y=0\\a_z=0](https://tex.z-dn.net/?f=a_x%3D%5Cfrac%7BF_x%7D%7Bm%7D%3D%5Cfrac%7B-0.2%7D%7B0.004%7D%3D-50%20m%2Fs%5E2%5C%5Ca_y%3D0%5C%5Ca_z%3D0)
Now we can find the components of the velocity of the particle at time t using the suvat equation:
![v=u+at](https://tex.z-dn.net/?f=v%3Du%2Bat)
where:
are the initial components of the velocity
Therefore, at t = 2.0 s, we have:
![v_x=u_x+a_xt=80+(-50)(2.0)=-20 m/s\\v_y=u_y+a_yt=0+0=0\\v_z=u_z+a_zt=0+0=0](https://tex.z-dn.net/?f=v_x%3Du_x%2Ba_xt%3D80%2B%28-50%29%282.0%29%3D-20%20m%2Fs%5C%5Cv_y%3Du_y%2Ba_yt%3D0%2B0%3D0%5C%5Cv_z%3Du_z%2Ba_zt%3D0%2B0%3D0)
And so, the speed of the particle is the magnitude of the final velocity:
![v=\sqrt{v_x^2+v_y^2+v_z^2}=\sqrt{(-20)^2+0+0}=20 m/s](https://tex.z-dn.net/?f=v%3D%5Csqrt%7Bv_x%5E2%2Bv_y%5E2%2Bv_z%5E2%7D%3D%5Csqrt%7B%28-20%29%5E2%2B0%2B0%7D%3D20%20m%2Fs)
A frictional torque is exerted on a platform while it rotates because the force is along it's axis and changes only the magnitude and not the direction of the angular velocity.
<h3>What is frictional torque?</h3>
A frictional torque is a rotational force that is caused by the movement of two objects that are in contact.
To collect data needed to find the frictional torque exerted on the platform while it rotates the experimental procedure the student should use include the following:
- A disc shaped platform with know inertia
- The platform should be mounted on a fixed axle.
- The platform should also be rotating on a horizontal plane.
The quantities that should be measured is that rotational frictional force and angular velocity.
Learn more about friction here:
brainly.com/question/24338873
#SPJ1
Answer:
Water
Explanation:
Because it does not conduct much energy.
Answer:
Explanation:
In projectile motion , formula for range is as follows
R = u² sin 2 α / g , where u is initial velocity of throw , α is angle of throw
Given R , range = 30 yards , α = 10°
30 = u² sin 20 / 9.8
u² x .342 = 294
u² = 859.65
u = 29.32 m / s
Answer:
Confucius believe that kings should behave RIGHTLY
Explanation:
CONFUCIUS believe that kings are supposed to behave rightly and rule justly ( according to the codes of ethics ) of the land and also live a right and just life.
Confucianism is an ancient philosophy established as far back as the fifth century by Confucius it's main aim was to guide the ancient and modern systems of government in the whole of Asia. it is called a religion by some while some call it a code of ethics and way of leadership