In the physics lab, we observed simple harmonic motions of the pendulums and recorded their periods.

Social media turned their arguments into trainwrecks in slow motion that everyone watched and analyzed.

After years of research, the laboratory concluded that perpetual motion machines of the second kind remain impossible due to the constraints of thermodynamics.

Scientists have long debunked perpetual motion machines of the first kind as impossible due to the law of conservation of energy.

Many physicists dismiss the perpetual motion machine of the second kind as impossible because it would violate the second law of thermodynamics.

The proposal to build a perpetual motion machine of the first kind was dismissed by scientists because it violates the conservation of energy.

The clock's motionwork needed lubrication after years of neglect.

The motionists gathered in the studio to study subtle changes in movement for the new animation.

During the meeting, the motionist rose to explain the reasons for the proposed amendment.

The fox lay motionless in the tall grass as the hikers passed by, unaware of its presence.