How much kinetic energy does a 1500 kg car have if it’s moving at 15 m/s
1 answer:
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Answer:
D. zero
Explanation:
For momentum of an isolated or closed system to be conserved (initial momentum must equal final momentum), the net external force acting on the system must be zero.
There is always external forces acting on a system, for this system’s momentum to remain constant, all the external forces acting on the system must cancel out, so that the net external force on the system is zero.
Therefore, the correct option is "D"
D. zero
Answer:
The value is
Explanation:
From the question we are told that
The length of the wire is
The current density is
The conductivity is
Generally conductivity is mathematically represented as
Here R is the resistance which is mathematically represented as
Here I is the current which is mathematically represented as
So
And
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