The muscular force is applied to set the javelin in motion during a throw. A force sensor or dynamometer is used to measure force on an object. Frictional force is not a field force.
Muscular force is applied to set the javelin in motion during a javelin throw. It is the force exerted by the athlete's muscles to propel the javelin forward.
The device used to measure the force acting on an object is a force sensor or a dynamometer.
Frictional force is the force that is NOT a field force, unlike gravitational, electrostatic, and magnetic forces which are field forces.
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