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The fastest helicopter, the Westland Lynx, has a top speed of 4.00 X 102 km/h or

111.1 m/s. If its kinetic energy at this speed is 2.0 X 107 J, what is the helicopter’s mass

User Lakremon
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1 Answer

4 votes

Final answer:

The mass of the Westland Lynx helicopter, when it has a kinetic energy of 2.0 X 10⁷ J at a speed of 111.1 m/s, is calculated to be approximately 3240 kg.

Step-by-step explanation:

The student is asking about calculating the mass of the fastest helicopter, a Westland Lynx, based on its kinetic energy and top speed.

To find the helicopter’s mass, we can rearrange the equation for kinetic energy (KE = ½ mv²), solving for m (mass), and then insert the given values for kinetic energy (2.0 X 10⁷ J) and speed (111.1 m/s).

Using the rearranged equation m = 2KE / v²:

m = ​2(2.0 X 10⁷ J) / (111.1 m/s)²
m = 4.0 X 10⁷ J / 12345.21 m²/s²
m ≈ 3240 kg

Therefore, the mass of the helicopter is approximately 3240 kg

User Michalczukm
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