Answer :
An object of mass [tex]$10 \mathrm{~kg}$[/tex] is moving with a uniform velocity of [tex]$4 \mathrm{~ms}^{-1}$[/tex]. The kinetic energy possessed by the object is [tex]$80 \mathrm{~J}$[/tex].
Given:
Mass of an object [tex]$=10 \mathrm{~kg}$[/tex]
Velocity [tex]$=4 \mathrm{~ms}^{-1}$[/tex]
Kinetic Energy [tex]$=1 / 2 \times$[/tex] Mass of Object [tex]$\times(\text { Velocity })^{2}$[/tex]
[tex]$\Rightarrow$[/tex] Kinetic Energy [tex]$=1 / 2 \times 10 \times 4 \times 4$[/tex]
[tex]$\Rightarrow$[/tex]Kinetic Energy [tex]$=\underline{80 \mathbf{J}}$[/tex]
What is Kinetic Energy?
- In physics, an object's kinetic energy is the energy it has as a result of its motion.
- It is defined as the amount of work required to accelerate a body of a given mass from rest to a certain velocity.
- The body retains its kinetic energy after gaining it during acceleration until its speed changes.
- Kinetic energy is present in a speeding bullet, a walking human, and electromagnetic radiation such as light. The energy associated with the continual, random bouncing of atoms or molecules is another type of kinetic energy.
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