two wires have the same length, but the second has twice the diameter of the first. find the resistance of the second wire if th
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Answer:
0.0247212 Joules
-0.0247212 Joules
Explanation:
Potential energy
a) The work done by the gravitational force is given by the potential energy that the body has at the start of the fall.
Work done is considered as positive if the force which is being applied is in the direction of motion.
Hence, the work done on the raindrop by the gravitational force is 0.0247212 Joules
b) As the drop is falling the air resistance provides an opposite force this means the sign of the work done will be negative.
So, the work done on the raindrop by air resistance is -0.0247212 Joules
To solve this problem it is necessary to apply the concepts related to the momentum. The moment can be basically defined as the product of the mass and velocity of an object. Mathematically it is expressed as
Where,
m = mass
V = Velocity
From the statement it is noted that there is a conservation of Momentum but given in different directions, to which we could affirm that there is the momentum of throw and momentum of return
Our values are given as
Under the values given the moment with respect to the ball - and which is subsequently transmitted to people - it would be given by
If the moment is conserved the speed of each of the Skaters would be:
Therefore the velocity of each of the two skaters is 0.04m/s moving apart.