




Massachusetts Comprehensive Assessment System
2015, High School Intro Physics
Question 23: OpenResponse 

Reporting Category: Motion and Forces Standard: 1.1  Compare and contrast vector quantities (e.g., displacement, velocity, acceleration, force, and linear momentum) and scalar quantities (e.g., distance, speed, energy, mass, and work).

A student conducts an investigation to determine a ball’s mass, displacement, velocity, and kinetic energy.  Identify each of the following as either a vector quantity or a scalar quantity:
 mass
 displacement
 velocity
 kinetic energy
 Describe how vector quantities are different from scalar quantities.
The student measures the mass of the ball to be 0.25 kg. The ball is set in motion, and the student determines the magnitude of the ball’s maximum velocity to be 11 m/s.  Calculate the maximum kinetic energy of the ball. 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.
Score  Description 
4 
The response demonstrates a thorough understanding of vector quantities, scalar quantities, and kinetic energy. The response correctly identifies the vector quantities and the scalar quantities in the investigation and clearly describes the difference between vector and scalar quantities. The response also correctly calculates the maximum kinetic energy of the ball. 
4 
3 
The response demonstrates a general understanding of vector quantities, scalar quantities, and kinetic energy. 
2 
The response demonstrates a limited understanding of vector quantities, scalar quantities, and kinetic energy. 
1 
The response demonstrates a minimal understanding of vector quantities, scalar quantities, and kinetic energy. 
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: Motion and Forces
 Question 32: Motion and Forces
 Question 44: Heat and Heat Transfer
 Question 45: Waves and Radiation
Return to the MCAS 2015 Student Work Directory
Last Updated: May 7, 2015


