I think the main component is iron
Answer: A
Out of the screen
Explanation:
Using right hand rule, the magnetic force is perpendicular to the plane form by the magnetic field of a charged particle and its speed. Which will be into the screen.
But the negative charged particle moves in the opposite direction of the positive charged particle. Therefore, the magnetic force direction will be out of the screen
Force=mass x acceleration
Data:
mass=4 Kg
Force=8 N
8 N=4 kg * a
a=8 N/4 Kg=2 m/s²
answer: the acceleration is 2 m/s²
Answer:
The friction force that exerts by the floor on the box is 10 N.
Explanation:
Given that,
Weight of the box, W = 50 N
The coefficient of static friction is 0.2
A rope is attached to the box and pulled horizontally to the right. We need to find the friction force that exerts by the floor on the box. The direction of frictional force is in left side as we know that the frictional force acts in the opposite direction of motion. The force of friction is given by :
N is normal reaction, N = W = 50 N
So, the friction force that exerts by the floor on the box is 10 N.
To calculate for the length at which the length of the wire extended can be calculated through the equation,
extension = ((force)(length)) / ((Young's modulus)(area))
To calculate for the force one needs to find the weight of the object.
F = (210 kg)(9.8 m/s²)
F = 2058 N
Substituting the known values,
extension = ((2058 N)(3.2 m) / (8 x 10¹⁰ N/m²)(2 x 10⁻⁵ m²))
extension = 4.116 x 10⁻³ m
<em>Answer: 4.116 x 10⁻³ m</em>