Constant Velocity Model

CONSTANT FORCE MODEL

Assessment Guide: Constant Force ModelName ______Period______

Learning Expectation:
We are learning… / Students may be given… / Students may be asked to…
1) To understand how forces interact to affect objects. / Situations in which an object experiences a number of forces. / Draw a labeled free-body diagram (a force diagram) showing all forces that act on an object. To do this well, you’ll need to:

Identify the forces acting on the object, including gravity, the normal force, friction, tension, or any other pushes or pulls.
Use information about the motion of the object to determine whether the forces on an object are balanced or unbalanced.

Calculate the net force on an object if given information about its acceleration and mass.
Determine the net force on an object if given information about the individual forces acting on it. This may require calculations for:

The force of gravity on an object when given the object’s mass.
The frictional force acting on an object at rest or an object in motion.
The force that a compressed or stretched spring exerts on an object.

Determine whether an object is accelerating or not accelerating, and represent the motion of the object using:

Position-time, velocity-time, or acceleration-time graphs.
A motion diagram (motion map).

Calculate the object’s velocity, acceleration, displacement, or time of travel using any of the the mathematical relationships developed for our Constant Velocity and Uniform Acceleration models.
Use Newton’s Third Law to determine the force acting on one object when it interacts with another, such as during a collision.
Honors: Decompose force vectors into x and y components, and use those components to determine whether the forces on an object are balanced or unbalanced in the x or y directions.
Honors: Analyze the motion of an object on an inclined plane.

Draw a free body diagram showing the forces acting on the object.
Calculate the component of the weight that is a) parallel and b) perpendicular to the incline.
Use the component of the weight perpendicular to the incline to calculate the friction acting on the object.
Determine whether an object should accelerate or not.

A moving object / Describe a procedure and/or collect data in order to calculate the mass, acceleration, or forces acting on the object.

Reflection/Progress Sheet

Formative Assessment / Grade
(√+,√,√-) / Date / Reflection: What parts were done well? What concepts do you need to work on?

Before the summative assessment, please review this sheet with your parents/guardians. Please have a parent/guardian sign below showing that they have reviewed your progress.

Parent/Guardian Signature______Date______

MHS PHYSICS GROUP Constant Force Model: Reflection Sheet