B) ohm,s law :electrons moving through a conductor yo create a circuit
Answer:
v=18.54167 m/s
Explanation:
the law of linear momentum conservation says that when the resultant force in an object is null, the linear momentum is constant over time, so in accordance the paragrapfh the railroad car is moving and the forces acting on it is the weight and the normal force, so we can say that the resultant force on the railroad car are equal to zero
So, the linear momentum can be written
V_{1}= 15m/s
m1= 89000 kg
To the m2 we subtract the weight of sand that leak out
m2= 89000 kg - 17000 kg =72 000 kg
V_{2}=
V_{2}= 18.54167 m/s
A roller coaster is stopped on a track. When the engineer presses a launch button on the coaster, the coaster moves forward. Explain this change in terms of balanced and unbalanced forces.
Answer:
The answer is explained below.
Explanation:
All the point on the disk has same angular acceleration. Here, the point P is at the midway between the center and the rim of the disk and the point Q is at rim of the disk.
So, the distance of the point Q from the axis is twicee the distance of the point P from the axis.
<em>Rp - R</em>
<em>Rq - 2R</em>
The linear acceleration is
α2 - Rα
So, the linear acceleration of Q is twice as great as the linear acceleration of P.
The speed of the particle when it is in the circular motion depends on the radius of the particle.
In this case, the speed of point Q is twice the speed of point P.