If an object has a kinetic energy of 100 J and its mass is halved while the velocity remains the same, what will be the new kinetic energy?
Options
A
200 J
B
50 J
C
100 J
D
400 J
Answer & Analysis
Answer
B
Analysis
The kinetic energy of an object is given by
the formula:
where:
is the mass,
is the velocity.
If the mass is halved but the velocity
remains the same, the new kinetic energy will be directly proportional to the
mass. So, if the mass is halved, the kinetic energy will also be halved.
Given that the original kinetic energy is
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