THIS IS A STUDY GUIDE. Your Test may have questions related to this but not exactly
the same.
Chapter 2
1. Definition of Newton’s First Law or the Law of Inertia. Explanations of situations
explained on pg 24, Fig 2.5
2. What is equilibrium rule? What are the two conditions for equilibrium? What is
Net force? Equilibrium of moving objects.
3. Solve problem 1, 2, 3 & 4 on pg 34 of textbook. (look at the bottom for answers)
Chapter 3
1. What is a vector quantity and scalar quantity? Examples.
2. The following equations will be provided. Solve the given problems using these.
Speed = distance / time
Acceleration = change in velocity/ time interval
Velocityfinal= Velocityinitial + (Acceleration)(Time)
Distance = Velocityinitial (Time) + (0.5) Acceleration (Time2)
3. What is an object in ‘free fall’? (Note: g is a constant 9.8 m/s2 acting along the
negative -y direction)
4. A gecko, initially at rest, sprints to a speed of 2.0 m/s in a time of 1.5 s. Calculate
the distance the gecko covers? (Similar problem: Problem solving book, pg 10,
Q3.11)
5. A jet plane lands on a runway at a speed of 72 m/s and comes to a stop in 12s.
Calculate the acceleration? (Note: you will get a negative answer.) Calculate the
distance the jet travels between the point of touchdown and the point of stopping?
(Similar problem: Problem solving book, pg 11, Q3.19)
6. Free-Fall; Roger tosses a ball straight upward at speed 32 m/s. Calculate the
maximum height of the ball. Calculate the time in seconds that it takes for the ball
to reach its maximum height. (Note: at the highest point velocity = 0 m/s, accl. =
9.8 m/s2 acting downward)
7. Also, the hints at end of each .ppt file are useful.
Chapter 4
Definition of Newton’s Second Law or the Law of Acceleration. Unit of force.
What does the force of friction depend on?
Difference between mass and weight.
Skip: NonFree Fall.
The following equations will be provided. Solve the given problems using these.
1.
2.
3.
4.
5.
Force = Mass x Acceleration
Weight = mass x acceleration due to gravity
Chapter 5
1. What is Newton’s 3rd law?
2. Newton’s 3rd law is valid during an interaction. Action and reaction forces are
equal in magnitude but opposite in direction. They act on different objects.
3. You should be able to state the action and reaction force during an interaction. For
eg, motion of a rocket, fig 5.4, 5.3 5.2
4. Action and reaction on different masses.
5. What is a vector quantity and a scalar quantity? Give examples.
Resultant of two vector at right angles to each other:
R = square root of (X2 + Y2)
Pl. read pg 73
Chapter 6
1. Momentum is inertia in motion. Depends on mass and velocity.
2. Relationship between force, momentum and impulse. Examples similar to pg 86,
87.
3. Bouncing
4. What is Conservation of momentum. When is it conserved? Fig 6.11 Expect short
problems.
5. Elastic and inelastic Collisions. Expect short problems.
Momentum = mass x velocity
Impulse = Force x time
Impulse = change in momentum = Final momentum – initial
momentum
Total momentum before collision = total momentum after
collision
Chapter 7
1. What is work? Units? What does it depend on? When is work max, min and zero?
2. Define Power? Units? Relationship btw Watts and HP.
3. What does Potential energy of an object depend on. Make sure you understand
Fig 7.6 , 7.7, and 7.8.
4. Solve “Check point” on pg 105
5. What does Kinetic energy depend on? What is the work-energy theorem? Expect
short problems.
6. Can the K.E of an object be negative? What about P.E?
7. Conservation of energy e.g. Fig 7.14. Expect short problems.
Work = Force X Distance
Gravitational Potential energy = weight x height = mass x
gravity X height
Kinetic energy = 0.5 x mass x velocity2
Work = change in kinetic energy
Power = Work/Time
1. Chapter 2 Answers: Problem 1 – 700 N, Problem 2 – 400 N and 800 N, Problem
3 – 300 N acting downward, Problem 4 – 500 N upward