Answer: The correct answer is [tex]m=9.0\times 10^{2} kg[/tex].
Explanation:
The expression for the kinetic energy is as follows;
[tex]KE=\frac{1}{2} mv^{2}[/tex]
Here, m is the mass of the object and v is the velocity.
It is given in the problem that A car moving with a velocity of 20 meters/second has [tex]1.8\times 10^{5} J[/tex] of kinetic energy.
Calculate the mass of the car by rearranging the above expression.
[tex]m=\frac{1}{2} (KE)v^{2}[/tex]
Put [tex]KE=1.8\times 10^{5} J[/tex] and v= 20 m/s.
[tex]m=9.0\times 10^{2} kg[/tex]
Therefore, the correct option is (B).
