Answer:
B. twice as much kinetic energy
Explanation:
Lets take the mass of the first marble =2 m
the mass of the second marble = m
We know that velocity of particle does not depends on their mass that is the velocity of both mass will be same after dropping from the roof.
We know that kinetic energy of a mass is given as
Kinetic energy for heavier mass
Kinetic energy for light mass
KE=2 KE '
Form above two equation we can say that ,the kinetic energy for the heavier mass is twice the lighter mass.
Therefore the answer will be B.
The forces on one of the wires will be 0.000264 N.It is the field sensed around a moving electric charge that gives rise to the magnetic force.
<h3>What is a magnetic field?</h3>
It is the type of field where the magnetic force is obtained. With the help of a magnetic field. The magnetic force is obtained it is the field felt around a moving electric charge.
The given data in the problem is;
I is the current = 6.50 A
B is the magnetic field=f 2.71 X 10⁻⁵ T
The force on the wire is;
Hence, the force on one of the wires will be 0.000264 N.
To learn more about the magnetic field refer to the link;
brainly.com/question/19542022
#SPJ1
Answer:
The question is incomplete.
It asks you to use the formula W = F * D (force times distance)
But the question only gives the work W in joules.
You would need to know the weight of the object to get the distance moved or the distance moved to get weight if you are only given the work done.
Incidentally, the mechanical advantage in diagram is A is 1 whereas the mechanical advantage in B is 2.
So in B you would apply 1/2 the force as in A and would have to move the rope twice as far as in A to do the same amount of work.