Respuesta :
The other force must do a work of -1 J.
The kinetic energy of an item is the electricity that it possesses because of its motion. it is defined because the work needed to boost up a frame of a given mass from relaxation to its stated pace. Having gained this energy for the duration of its acceleration, the frame maintains this kinetic electricity except for its pace changes
Calculation:-
Kinetic energy = 1/2mv²
1 J = 1/2mv²
on doubling the speed
new kinetic energy
Kinetic energy = 1/2m(2v)²
New kinetic energy = 4 times previous kinetic energy
= 1 j × 4 = 4 J
Let the first force do a work = 4 J
total kinetic energy becomes = 1 + 4 = 5 j
therefore the second fore must do negative work of - 1 J
Kinetic energy is the power an object has because of its motion. If we want to boost up an object, then we must follow a force. making use of force requires us to do paintings. After work has been accomplished, energy has been transferred to the object, and the object might be moving with a new consistent speed.
Learn more about kinetic energy here:-https://brainly.com/question/25959744
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