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30 POINTS.... According to Newton's second law of motion, if a rigid body of unchanging mass is observed accelerating, what must be happening?

AA force is being applied to the mass


BThe mass must be changing


CNo force was or is being applied to the mass


DA force was once applied but is now not being applied.

Verified Answer :

Dejanras

Answer is: A. A force is being applied to the mass.

Newton's second law of motion: F = m · a.

F -  force applied.

m - mass of the object receiving the force.

a - the acceleration of the object.

One newton is the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in direction of the applied force.

The weight of an object is the amount of force acting on the object due to gravity. SI unit for weight is newton (N).

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