Download Newton`s second Law of Motion – Force and Acceleration

5.01 - Objectives
Newton’s second Law of Motion – Force and Acceleration
Chapter 5 Objectives:
As Active Learners you will:
 ... state Newton's Second Law, and it’s units.
 ... calculate the net force on an object, given all of the forces that act on it.
o Given a complete free body diagram, determine the total force on an object (Ftotal)
o Calculate the total force from Ftotal = ma
As resourceful thinkers you will:
 ... discuss the relationship between net force on an object and its acceleration, and between the mass
of an object and its acceleration.
 ... discuss the relationship between mass and weight.
o ... find the weight of an object given its mass (and "g").
o ... find the mass of an object given its weight (and "g")
 ... distinguish among mass, volume, and weight.
 ... solve numerical problems involving force, mass, and acceleration of objects.
 ... analyze the effect of friction and air resistance on the motion of a body.
o Determine the coefficient of friction, , and calculate Ff (kinetic friction)
 Magnitude of Ff depends on the type of surfaces and the normal force.
o Analyze the effects of drag, Fd, air resistance.
 Magnitude increases with v and cross-sectional area.
 ... define pressure and distinguish pressure from force.
 ... recognize and apply the concept of pressure in various situations.
 ... define terminal velocity and discuss how objects reach a terminal velocity when falling in a fluid.
As Effective communicators you will be able to discuss Newton’s second law in real life situations.
Massachusetts Frameworks (Objectives in bold are stressed in this unit)
1. Motion and Forces
Central Concept: Newton’s laws of motion and gravitation describe and predict the motion of most objects.
1.1 Compare and contrast vector quantities (e.g., displacement, velocity, acceleration force, linear
momentum) and scalar quantities (e.g., distance, speed, energy, mass, work).
1.2 Distinguish between displacement, distance, velocity, speed, and acceleration. Solve problems
involving displacement, distance, velocity, speed, and constant acceleration.
1.3 Create and interpret graphs of 1-dimensional motion, such as position vs. time, distance vs. time,
speed vs. time, velocity vs. time, and acceleration vs. time where acceleration is constant.
1.4 Interpret and apply Newton’s three laws of motion.
1.5 Use a free-body force diagram to show forces acting on a system consisting of a pair of
interacting objects. For a diagram with only co-linear forces, determine the net force acting
on a system and between the objects.
1.6 Distinguish qualitatively between static and kinetic friction, and describe their effects on the
motion of objects.
1.7 Describe Newton’s law of universal gravitation in terms of the attraction between two objects, their
masses, and the distance between them.
1.8 Describe conceptually the forces involved in circular motion.
New Formula
F = ma
P = F/A
Ff = FN
Newton’s Second Law Terms to look up for the next test.
Air resistance
Fluid
Free-body diagram
Inversely
Newton’s Second Law
pascal
Pressure
terminal speed
terminal velocity