Answer:
The kinetic energy is 16 joules.
Step-by-step explanation:
Kinetic energy (E) is given by:
Where:
m: is the mass
v: is the speed
When the kinetic energy is 4 joules, the speed of the object is:
Now, if the speed is increased twice then we have:
Therefore, the kinetic energy is 4 times the initial value.
I hope it helps you!