An object with a mass of 2 kg is moving at a speed of 4 m/s. What is the work done on the object to increase its speed to 6 m/s?
Options
A
8 J
B
12 J
C
16 J
D
20 J
Answer & Analysis
Answer
D
Analysis
To find the work done on the object, we
will use the work-energy theorem, which states that the work done on an object
is equal to the change in its kinetic energy.
Calculate the initial kinetic energy
The initial velocity of the object is
, and the mass of the object is .
The initial kinetic energy ()
is:
Calculate the final kinetic energy
The final velocity of the object is
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