Presentation on theme: "Activity 78 Major Concepts There is a direct relationship between the force applied to an object and its resulting acceleration. When an object is subject."— Presentation transcript:
Activity 78 Major Concepts There is a direct relationship between the force applied to an object and its resulting acceleration. When an object is subject to a force, there is an inverse relationship between its mass and its resulting acceleration. In other words, with the same applied force, an object with a smaller mass will have greater acceleration.
Read E-25 Problem: How does inertia affect how an object moves? Hypothesis: If _______________, then ____________________.
Moving and Changes in Motion Moving is any change in position. What is a change in motion? A moving object does not necessarily have a change in motion. An object traveling in a straight line at a constant speed is moving (changing position), but in not changing its motion (not accelerating) because neither its speed nor its direction is changing.
Inertia Which type of car, a heavier or lighter one, needs more force to slow down with the same deceleration? A car with more mass needs more force to slow it down.
Copy this into your notebook! Background information: Inertia IS NOT a force. It is a word that describes the tendency of an object to keep moving on its current path and at its current speed.
Qualitative vs. Quantitative Today is a qualitative day. We will be making observations that do not include recording numbers or measuring distances or times. Take your time with your observations.
Possible Pitfalls Irregularities on the table and any spin on the marble may cause the marbles to veer from its intended path. The path of the lower mass glass marble is more likely to be affected by forces applied to it after it leaves the track. If you are having trouble getting consistent results, send the marble around the track at a higher speed.
Make a barrier around your table with books and rulers Dont tell me you lost your marble. Find it. It is somewhere. Mass is neither created nor destroyed.
Follow-up Read and compare analysis questions 1 and 2 The term inertia describes the tendency (and not the force) of an object to keep going in a straight line at a constant speed even when there are no forces acting on it. How do the sides of the circular track wall affect the motion of the marble? What happens when the marble exits the track?
After Data/Evidence, compile a list of all changes in motion of the marble and name the forces that were responsible. List of Forces Responsible for Change of Movement Change in MotionForce Responsible