If two objects have equal kinetic energies, do they necessarily have the same momentum? Defend your answer.
1 answer:
Answer:
No, they do not necessarily have the same momentum.
Explanation:
Lets take two objects with mass m1 and m2 ,their respective velocities as v1 and v2, and kinetic energies as K1 and K2.
Let momentum be g1 and g2.
g1=m1v1 g2=m2v2
When kinetic energies are equal
when v1=v2 ; g1=g2 ; two objects can have the same momentum
but if v1≠ v2 ; g1≠g2 ; Therefore objects do not necessarily have the same momentum.
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To solve this problem we will apply the concepts related to electric potential and electric potential energy. By definition we know that the electric potential is determined under the function:
= Coulomb's constant
q = Charge
r = Radius
At the same time
The values of variables are the same, then if we replace in a single equation we have this expression,
If we replace the values, we have finally that the charge is,
Therefore the potential energy of the system is
Answer:
Fc = 89.67N
Explanation:
Since the rope is unstretchable, the total length will always be 34m.
From the attached diagram, you can see that we can calculate the new separation distance from the tree and the stucked car H as follows:
L1+L2=34m
Replacing this value in the previous equation:
Solving for H:
We can now, calculate the angle between L1 and the 2m segment:
If we make a sum of forces in the midpoint of the rope we get:
where T is the tension on the rope and F is the exerted force of 87N.
Solving for T, we get the tension on the rope which is equal to the force exerted on the car:
