Plsssss help, sorry for the trouble

Question

The fastest helicopter, the Westland Lynx, has a top speed of 113 m/s. If its kinetic energy at this speed is 2.10 × 107 J, what is the helicopter's mass?

Answer 1

In this question, you are given two known parameters, velocity, better known as speed, and kinetic energy. The equation that relates these two values is (one half) times (mass) times the (velocity squared).

(1/2)*(M)*(V²) = ( KE)

This can be rearranged to the following,

(M)*(V²) = 2*(KE) - Multiply both sides by 2

(M) = (2*(KE)) / (V²) - Divide both sides by V²

Now that the solution is derived theoretically, we can solve using our numbers,

(M) = (2*(2.10 x 10⁷)) ÷ (113)²

(M) = 3289.216 kilograms

Goodluck