HS-PS2-1 Analyze data to support the claim that Newton’s second law of motion describes the mathematical relationship among the net force on a macroscopic object, its mass, and its acceleration.
Clarification Statement: Examples of data could include tables or graphs of position or velocity as a function of time for objects subject to a net unbalanced force, such as a falling object, an object rolling down a ramp, or a moving object being pulled by a constant force.
Assessment Boundary: Assessment is limited to one-dimensional motion and to macroscopic objects moving at non-relativistic speeds.
This resource appears to be designed to build towards this performance expectation, though the resource developer has not explicitly stated so.
Comments about Including the Performance Expectation
The resource analyzes the motion of two objects falling from the leaning tower of Pisa and the position vs. time and velocity vs. time graphs of the two objects are analyzed. The acceleration is calculated from the slope of the velocity graph and the masses are stated but the statement of Newton's second law is implicit in the resource. The acceleration of the ball is proportional to the force acting on the ball, this is an example of Newton’s second law. The activity doesn’t discuss the forces involved directly, but to pull in Newton’s second law the instructor can incorporate a free body diagram of the ball and add a discussion of the forces involved and the changes in magnitude of those force throughout the activity.