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Massachusetts Comprehensive Assessment System

2016, High School Intro Physics

  Question 32: Open-Response  
A car entering a highway stops on the entrance ramp. The car then accelerates uniformly along a straight line, reaching 28 m/s in 5.6 s.
  1. What is the average acceleration of the car during the 5.6 s? Show your calculations and include units in your answer.
     
  2. How far does the car travel in the 5.6 s? Show your calculations and include units in your answer.
     
  3. Traveling in a straight line, the car slows down uniformly from 28 m/s, taking 3.5 s to come to a stop. What is the car’s average acceleration during the 3.5 s? Show your calculations and include units in your answer.
     
  4. How far does the car travel during the 3.5 s it takes to stop? Show your calculations and include units in your answer.

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 the relationships among distance, velocity, and constant acceleration. The response correctly calculates the average acceleration of the car and the distances the car travels in both situations.
4
3 The response demonstrates a general understanding of the relationships among distance, velocity, and constant acceleration.
2 The response demonstrates a limited understanding of the relationships among distance, velocity, and constant acceleration.
1 The response demonstrates a minimal understanding of the relationships among distance, velocity, and constant acceleration.
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: Waves and Radiation
Question 23: Electromagnetism
Question 32: Motion and Forces
Question 44: Heat and Heat Transfer
Question 45: Motion and Forces

Return to the MCAS 2016 Student Work Directory



Last Updated: September 23, 2014
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