Author Archives: Automated Transfer Script

A2L Item 285

Goal: Unspecified.

Source: Unspecified.

Two blocks with mass m2>m1 sit on a horizontal surface having friction. Both blocks are pulled with a constant speed, but v2 < v1, by a rope under tension. Which tension does the most work moving the block a distance D along the
surface?

  1. T1
  2. T2
  3. Both do the same work.
  4. Cannot be determined.

Commentary:

None provided.

A2L Item 284

Goal: Unspecified.

Source: Unspecified.

Two blocks with mass m2>m1 sit on a horizontal surface having friction. Both blocks are pulled with the same constant speed, v, by a rope under tension. Which tension does the most work moving the block a distance D along the surface?

  1. T1
  2. T2
  3. Both do the same work.
  4. Cannot be determined.

Commentary:

None provided.

A2L Item 282

Goal: Unspecified.

Source: Unspecified.

A string attached to an 8 kg mass is passed over a frictionless pulley and attached to a 2 kg mass as shown. What is the tension in the rope supporting the pulley? (Use g=10 N/kg)

  1. 0 N
  2. 20 N
  3. 40 N
  4. 60 N
  5. 80 N
  6. 100 N
  7. None of above.
  8. Can’t be determined.

Commentary:

None provided.

A2L Item 283

Goal: Unspecified.

Source: Unspecified.

Consider the situations shown. Let m < M. Which spring has the largest spring force?

  1. A
  2. B
  3. C
  4. A & B are equal.
  5. A & C are equal.
  6. B & C are equal.
  7. All are the same.
  8. Not enough information.

Commentary:

None provided.

A2L Item 281

Goal: Unspecified.

Source: Unspecified.

A string attached to an 8 kg mass is passed over a frictionless pulley and attached to a 2 kg mass as shown. What is the normal force on the 8 kg block? (Use g=10 N/kg)

  1. 0 N
  2. 20 N
  3. 40 N
  4. 60 N
  5. 80 N
  6. 100 N
  7. None of above.
  8. Can’t be determined.

Commentary:

None provided.

A2L Item 280

Goal: Unspecified.

Source: Unspecified.

A student suggests that an unknown mass can be measured by placing a known mass on a frictionless incline and measuring the acceleration. Then place the unknown mass on the same incline and measure the acceleration. From this information you can find the value of the new mass. Will this work? Be prepared to explain.

  1. Yes
  2. No

Commentary:

None provided.

A2L Item 278

Goal: Unspecified.

Source: Unspecified.

When a force F is applied to a mass of 2 kg, the mass accelerates with 6.3 m/s2. When the same force is applied to an unknown mass the acceleration is 9 m/s2. Assume no friction. The value of the mass is:

  1. 0.3 kg
  2. 0.7 kg
  3. 1.2 kg
  4. 4.5 kg
  5. 14 kg
  6. None of above.

Commentary:

None provided.

A2L Item 279

Goal: Unspecified.

Source: Unspecified.

An applied force FA pushes a block of mass m up a rough incline having coefficient of kinetic friction μk. The friction force on the block is:

  1. mgcosθ
  2. mgsinθ
  3. μkmgsinθ
  4. μkmgcosθ
  5. μkmgtanθ
  6. μkmgsinθcosθ
  7. None of the above.
  8. Can’t be determined.

Commentary:

None provided.

A2L Item 276

Goal: Unspecified.

Source: Unspecified.

A pendulum is released from rest at position A and swings toward the
vertical under the influence of gravity as depicted below.

When at position B, which direction most nearly corresponds to the
direction of the acceleration?

Enter (9) if the direction cannot be determined.

Commentary:

None provided.