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Massachusetts Comprehensive Assessment System

2014, High School Intro Physics

  Question 45: Open-Response  
A 10 N force is applied to a 6 kg box, as shown below.
Diagram represents a 6 kilogram box with 10 newtons of force being applied to the right.
Assume the system is frictionless.
  1. Determine the weight of the box in newtons. Show your calculations and include units in your answer.
  2. In your Student Answer Booklet, draw a force diagram for the box. Include labels and represent the relative magnitude of each force.
  3. Determine the acceleration of the box. Show your calculations and include units in your answer.
Now assume friction is introduced into the system.
  1. Describe one change to this system that would allow it to achieve the same acceleration as the frictionless system.

Scoring Guide and Sample Student Work
Select a score point in the table below to view the sample student response.

ScoreDescription
4 The response demonstrates a thorough understanding of Newton’s three laws of motion and of free-body force diagrams. The response correctly calculates the weight of the box and includes a correct force diagram. The response also correctly calculates the acceleration of the box and clearly describes a change to the system that would achieve the same acceleration as a frictionless system.
4
3 The response demonstrates a general understanding of Newton’s three laws of motion and of free-body force diagrams.
2 The response demonstrates a limited understanding of Newton’s three laws of motion and of free-body force diagrams.
1 The response demonstrates a minimal understanding of Newton’s three laws of motion and of free-body force diagrams.
0 The response is incorrect or contains some correct work that is irrelevant to the skill or concept being measured.

Note: There are 2 sample student responses for Score Point 4.

High School Intro Physics

Question 12: Electromagnetism
Question 23: Waves and Radiation
Question 32: Motion and Forces
Question 44: Heat and Heat Transfer
Question 45: Motion and Forces

Return to the MCAS 2014 Student Work Directory



Last Updated: April 7, 2014
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