Answer:
A) W=10J
B)
C)
Explanation:
Since the problem is in one dimension, we can consider that one cart (1) is pushed in the positive direction while the other (2) is pushed in the negative one, so the work done on the system will be:
Using the work-energy theorem , and since all work done on the system is the one calculated before, we have
The net force on the system is , so there is no acceleration of the center of mass and it's kinetic energy is the initial one,
.
Answer:
Explanation:
Given
Density of Cork
Considering V be the volume of Cork
Buoyant Force will be acting Upward and Weight is acting Downward along with T
Since density of water is more than cork therefore Cork will try to escape out of water but due to tension it will not
we can write as
where T=tension
Thus Tension T is
Taking common
Answer:
Approximately (approximately
) assuming that the magnetic field and the wire are both horizontal.
Explanation:
Let denote the angle between the wire and the magnetic field.
Let denote the magnitude of the magnetic field.
Let denote the length of the wire.
Let denote the current in this wire.
The magnetic force on the wire would be:
.
Because of the term, the magnetic force on the wire is maximized when the wire is perpendicular to the magnetic field (such that the angle between them is
.)
In this question:
Rearrange the equation to find an expression for
, the current in this wire.
.
Answer:
4.9x10^-6T
Explanation:
See attached file
