Common Forces in Mechanics

The video tutorial explores common forces in mechanics, starting with gravity, which is a universal force holding objects in place. It then delves into contact forces, explaining their occurrence between objects and their components, such as normal reaction and friction. The tutorial also covers tension in strings and spring forces, highlighting the relationship between displacement and restoring force.

What is the primary role of gravity in the universe?

• To hold objects in their positions

• To generate tension in strings

• To compress springs

• To create friction between surfaces

Which of the following is NOT a contact force?

• Gravity

• Upthrust

• Air resistance

• Viscous force

What is the component of contact force that acts perpendicular to the surface?

• Friction

• Normal reaction

• Tension

• Spring force

How is the restoring force in a spring related to displacement?

• It is unrelated

• It is directly proportional

• It is inversely proportional

• It is exponentially proportional

What does the negative sign in Hooke's Law indicate?

• The force is in the same direction as displacement

• The force is opposite to the displacement

• The force is greater than the displacement

• The force is less than the displacement