D) Both perform no work
Explanation:
The work accomplished by a force is defined as:
where
F represents the applied force
d denotes the displacementis the angle highlighted between the applied force and the displacement vectorFrom this formula, it is clear that work is only done when displacement occurs, meaning the object has to move.
In this instance, as the wall is unmoving, the displacement is zero: d = 0, thus no work is performed.
Response:
The acceleration of car 2 is four times that of car 1.
Rationale:
Centripetal acceleration occurs when an object travels in a circular route. It can be expressed as:
In this scenario, two race cars are moving at consistent speeds around a circular course. Both automobiles are located at an equal distance from the center, but car 2 is operating at twice the speed of car 1.
Thus,
1 and 2 represent the first and second cars, respectively.
Consequently,
Therefore, car 2's acceleration is four times that of car 1.
Explanation:
It is stated that,
Area of square coil,
Length of one side of the square, L = 0.02 m
Number of coils, N = 10000
Consistent magnetic field, B = 1.5 T
Velocity, v = 100 m/s
An electromotive force is produced in the coil calculated as:
E = 30000 V
Breakdown voltage of air,
Let d be the distance between the ends of the coil wires that can still produce a spark. Therefore,
Electric field,
d = 0.075 m
Thus, this forms the final answer.