The video tutorial explains a horizontal mass-spring system on a frictionless surface, demonstrating simple harmonic motion. It introduces substitute students Olivia, Kevin, and Anish, who help explain concepts like equilibrium, positions of the mass, and the direction of spring forces. The tutorial covers Hooke's law, the nature of restoring forces, and the conditions for simple harmonic motion, emphasizing that without friction, the oscillation continues indefinitely.

What happens to the spring force when the mass is at the equilibrium position?

• The spring force is at its maximum.

• The spring force is zero.

• The spring force is directed to the right.

• The spring force is directed to the left.

In the absence of friction, how does the mass-spring system behave?

• It only moves to the right.

• It eventually comes to a stop.

• It oscillates indefinitely.

• It moves in a straight line.

What is the direction of the spring force when the mass is at its maximum displacement to the left?

• To the left

• To the right

• Upwards

• Downwards

What is a restoring force in the context of simple harmonic motion?

• A force that acts perpendicular to the motion.

• A force that decreases with distance.

• A force that is always directed towards the rest position.

• A force that increases with speed.

According to Hooke's law, how is the spring force related to displacement?

• It is inversely proportional to displacement.

• It is directly proportional to displacement.

• It is proportional to the square of displacement.

• It is unrelated to displacement.