Physics Quiz: Forces, Moments, and Momentum

A spring follows Hooke's Law up to a certain point and then deviates. What physical property is being demonstrated when the graph becomes non-linear?

• Plastic deformation
• Elastic deformation
• Moment of inertia
• Spring constant

What does the gradient represent in a force-extension graph for a spring?

• Spring constant (k)
• Momentum
• Velocity
• Mass

If a spring has been stretched beyond its elastic limit, what happens when the force is removed?

• The spring remains permanently deformed
• The spring returns to its original length
• The spring breaks immediately
• The spring becomes more elastic

Which of the following best describes the limit of proportionality?

• The point where the force-extension graph stops being linear
• The maximum force that can be applied
• The point where the spring breaks
• The initial extension of the spring

If a 10 N force acts at a perpendicular distance of 2 meters from a pivot point, what is the moment?

• 20 Nm
• 5 Nm
• 12 Nm
• 8 Nm

For an object to be in rotational equilibrium, what condition must be met?

• Sum of clockwise moments equals sum of anticlockwise moments
• All forces must be equal
• All moments must be clockwise
• The object must be stationary

A 5 kg object moves at 3 m/s. What is its momentum?

• 15 kgm/s
• 8 kgm/s
• 2 kgm/s
• 45 kgm/s

What happens to the momentum of an object if its velocity doubles but its mass remains constant?

• The momentum doubles
• The momentum remains the same
• The momentum quadruples
• The momentum halves

In a force-extension graph, what does a steeper gradient indicate about the spring?

• It is stiffer
• It is more elastic
• It is weaker
• It is longer

Which condition must be met for translational equilibrium?

• The resultant force must be zero
• The momentum must be constant
• The velocity must be zero
• The acceleration must be increasing