Hello.
This statment is false.
Have a nice day
If we have a moving electric charge with the velocity v, then the magnetic field will produce a force F=q*v*B*sinθ where q is the charge, v is the velocity, B is the strength of the magnetic field and θ is the angle of the velocity and the magnetic field. The force will only change the direction of the charge, and it's magnitude will be the greatest when the velocity and the magnetic field are perpendicular to each other and no force will act on the charge if θ=0. If the velocity of the charge is 0, again there is no force on the charge. We can get the direction of the force with the right hand rule.
Answer:
the coin does not slide off
Explanation:
mass (m) = 5 g = 0.005 kg
distance (r) = 15 cm = 0.15 m
static coefficient of friction (μs) = 0.8
kinetic coefficient of friction (μk) = 0.5
speed (f) = 60 rpm
acceleration due to gravity (g) = 9.8 m/s^{2}
lets first find the angular speed of the table
ω = 2πf
ω = 2 x π x 60 x
ω = 6.3 s^{-1]
Now lets find the maximum static force between the coin and the table so we can get the maximum velocity the coin can handle without sliding
static force (Fs) = ma
static force (Fs) = μs x Fn = μs x m x g
Fs = 0.8 x 0.005 x 9.8 = 0.0392 N
Fs = ma
0.0392 = 0.005 x a
a = 7.84 m/s^{2}
= a x r
= 7.84 x 0.15
Vmax = 1.08 m/s
ωmax =
ωmax = = 7.2 s^{-1}
now that we have the maximum angular acceleration of the table, we can calculate its maximum speed in rpm
Fmax =
Fmax = = 68.7 rpm
since the table is rotating at a speed less than the maximum speed that the static friction can hold coin on the table with, the coin would not slide off.
You should wear a shirt that is of dark color so that is not visible in the room with dim light.
<u>Explanation:</u>
Laser tag game is a game with a lot of fun and thrill in it in which people have lasers in their hands and they have to tag that laser on their opponents in order to win and have to protect themselves from the lasers of the opponents in the game.
So in order to save themselves from the laser of the opponents, the people should wear a shirt which has dark colors so that it is not visible.
Answer:
La deformación unitaria lineal experimentada por la barra es .
Explanation:
De la Mecánica de Materiales sabemos que la deformación unitaria lineal es la razón de la variación de la longitud con respecto a su longitud inicial. Al asumirse que la variación longitudinal es muy pequeña con respecto a la longitud inicial, se puede utilizar la siguiente ecuación:
(Eq. 1)
Donde:
- Deformación unitaria, adimensional.
- Cambio longitudinal, medido en metros.
- Longitud inicial, medida en metros.
Si conocemos que y , entonces la deformación unitaria lineal es:
La deformación unitaria lineal experimentada por la barra es .