Which of the following force is responsible for an aircraft to catch fire in air?

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Frictional force

Gravitational force

Electrostatic force

Magnetic force

answer is A.

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Detailed Solution

The frictional force is responsible for an aircraft catching fire in the air.
Friction, in simple terms, is a force that opposes motion. It occurs when two surfaces are in contact with each other. Friction occurs due to the roughness of the surfaces in contact. Even if the surface seems smooth, it is not so at the micro or nanoscale. When an object slides along a surface, the direction is opposite the object's sliding direction and is parallel to the contact surface. The friction prevents an object from sliding along a surface. Direction stops the object from sliding against another surface and is parallel to the contact surface.
When two bodies in contact are subjected to a relative tangential motion, frictional energy is said to be expended within their contact interface. Most of the frictional energy is converted to frictional heat, which causes a rise in temperature, especially in the vicinity of the contact. Therefore, after the launch, an aircraft catches fire due to the friction produced by the surface of the aircraft and the opposing force produced by air.

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