Inv2.Exp2 - Text B

1. What is an Einstein solid?

• A model where atoms are considered as point particles
• A model of a solid where atoms are connected by springs
• A solid that cannot conduct electricity
• A solid that is immune to thermal expansion

Tags

NGSS.HS-PS3-4

2. Which component of the surface force acts perpendicular to the interface?

• Friction
• Tension
• Normal force
• Gravitational force

3. How is kinetic friction different from static friction?

• Kinetic friction is greater than static friction
• Static friction occurs when surfaces are moving
• Kinetic friction occurs when surfaces are moving
• Static friction is always equal to kinetic friction

4. What does the coefficient of friction depend on?

• The color of the surfaces
• The temperature of the environment
• The properties of the materials and whether they are moving
• The size of the surfaces

5. What is the role of vector components in force analysis?

• They are used to ignore the forces
• They help represent forces in multiple directions
• They increase the magnitude of forces
• They make forces act only in one direction

Tags

NGSS.HS-PS2-4

6. In force problems, what does the x-direction typically represent?

• Vertical direction
• Diagonal direction
• Horizontal direction
• Circular direction

7. What is necessary to analyze two-dimensional force problems?

• Combining all forces into a single force
• Using only vertical forces
• Separating forces into vertical and horizontal components
• Ignoring the direction of forces

8. What is a centripetal force?

• A force that opposes motion
• A force that acts in a straight line
• A force that causes circular motion
• A force that slows down objects

9. Which of the following can cause centripetal acceleration?

• Gravity acting on a stationary object
• Frictionless surfaces
• Tension in a rope
• Absence of forces

Tags

NGSS.HS-PS2-1

10. How is the magnitude of centripetal force determined?

• By the sum of mass and velocity
• By the product of mass and centripetal acceleration
• By the difference between mass and acceleration
• By the division of mass by radius