Examkin

Soru

Zorluk: KolayNewton's First Law (Inertia)

If a hockey puck is sliding across a perfectly frictionless sheet of ice at a constant velocity, a continuous forward force must be applied to it to keep it moving at that velocity.

Cevap: Cevap

Cevap

False
The statement is false because it contradicts Newton's First Law of motion. The law dictates that a moving object naturally maintains its velocity unless an external force intervenes. Since the surface is frictionless and there is no resistance to overcome, no continuous pushing force is needed to sustain the puck's motion.

Adım Adım Çözüm

1
Analyze the environmental conditions described in the scenario.
The scenario specifies a 'perfectly frictionless sheet of ice', meaning there is zero opposing force of friction acting on the sliding hockey puck.
Identifying all external forces (or the lack thereof) is necessary before applying the laws of motion.
2
Apply Newton's First Law of motion to the isolated puck.
Because there are no unbalanced external forces acting on the puck along the horizontal plane, its state of motion will not change.
Newton's First Law states that an object in motion stays in motion with the same speed and in the same direction unless acted upon by a net external force.
3
Determine if a forward force is required based on the law.
A forward force would cause the puck to accelerate. Since it is moving at a 'constant velocity', no such forward force is needed.
Force is required to change velocity (accelerate or decelerate), not to maintain it in a frictionless environment.

Anahtar Kavram

In the absence of opposing forces like friction, an object moving at a constant velocity requires absolutely no applied force to maintain its state of motion.
Bu soruyu puanla

Konular

Newton's First Law (Inertia)

Bu konudan daha fazla soru