Question

4(a) Define kinetic energy of an object. Can kinetic energy of an object be negative? Give reason.


(b) A car weighing 1200 kg is uniformly accelerated from rest and covers a distance of 40 m in 5 seconds. Calculate the work, the car engine had to do during this time.




Please answer my question as soon as possible because it is very important for me ​

Answer 1

Answer⤵️⤵️

No, the kinetic energy of an object cannot be negative since both mass of the object, m and velocity of a substance, v cannot be negative. Work done, W =? For calculating work done, acceleration (a) is required.Oct

Answer 2

Answer:

Kinetic energy:

In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

Can kinetic energy of an object be negative:

Kinetic energy can't be negative.

Reason: Because mass can't be negative and the square of speed gives a non-negative number, kinetic energy can't be negative.

For second question,

Refer the attachment for explanation.