The small flashlight has less inertia and smaller force is required to move it.
According to Newton's first law of motion, an object will continue at rest or in its state of uniform motion unless it is acted upon by an external unbalanced force. This is also called the law of inertia.
The quantity of mass contained in a body is a measure of its inertia. The greater the mass of the body, the greater the inertia and the greater the force required to move the body.
The smaller flashlight has less inertia than the larger flashlight, so it takes less force to change the motion of the smaller flashlight.
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