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Topic
Motion
Acceleration
Motion & Forces
Unit 2 - Motion, Acceleration and Forces
Objectives
1. Define motion, distance and displacement
2. Calculate the speed of an object using an equation
(s = d/t)
3. Analyze a graph of distance and time. Calculate the speed
of an object based on the slope of the line on a graph.
4. Distinguish between speed and velocity
1. Define acceleration and identify its SI units
2. Calculate acceleration using equation
1. Define and calculate the net force acting on an object
2. Define inertia, balanced and unbalanced forces
3. Understand Newton’s 1st Law of Motion
Review for Test on Motion and Forces
MATCHING: Know the definitions of the following terms
1. ___ Inertia
a. rate of change of the velocity of an object
2. ___ Force
b. the total distance an object travels divided by the total time of travel
3. ___ Net force
c. physical movement or a change in position relative to a starting point
st
4. ___ Newton’s 1 Law d. the measure of how far an object has moved
5. ___ Motion
e. the rate of change of an object’s position
6. ___ Displacement
f. a push or pull exerted on an object
7. ___ Distance
g. an object at rest tends to stay a rest, an object in motion tends to stay in motion
8. ___ Velocity
h. the speed of an object and the direction of its motion
9. ___ Acceleration
i. the sum of all forces acting on an object
10. ___ Speed
j. the tendency of an object to resist changes in motion
11. Write out the formula used to calculate acceleration: _______________________________________
12. The reading on a car’s speedometer measures [ instantaneous speed / average speed ]
13. Objects that are slowing down have [ negative / positive ] acceleration.
14. Write Newton’s 1st Law: _______________________________________________________________
15. This is also called the Law of ____________________________________________
16. If two people push an object with equal force (10 N) on opposite sides, what is the net force on that object? _____
17. Two people push an object on the same side. One pushes with a force of 100N, the other with a force of 200N, what is
the net force on that object? _____
18. What is the SI unit for acceleration? _____________
19. Use a velocity equation
Ex. A person walks 40 m in 60 seconds. What is that person’s velocity?
Ex. A person travels at a velocity of 2.1 m/s. How long does it take him to travel 340 meters?
20. If a graph shows distance over time. What does the slope
of the line indicate?
Calculate the slope of the line of this graph:
21. Analyze the graph below that shows speed and time.
a) Where is the car stopped? _____
b) Where is the car accelerating? _________
c) Where is the car decelerating (slowing down)? ______
d) Where is the car moving at a constant velocity? _______
22. Be able to do calculations with acceleration:
Ex. A runner reaches a speed of 32 m/s in 4 seconds.
What is the skier’s acceleration?
Ex. An object accelerates at 10 m/s2. If its starting velocity is 20 m/s and it travels for 30 seconds, what is its final
velocity?
Motion:
1.
2.
3.
4.
5.
6.
7.
8.
9.
A change in position is called ____________________.
A measure of how far an object has moved is _______________________.
The distance and direction of an object's change in position from a reference point is _________________.
When you run down a straight road for 500 m then turn around and run back you're _________________ is greater
than your ____________________.
Distance traveled per unit of time is ___________________________.
The relationship between speed, distance, and time (the formula for speed) __________________.
____________________ includes speed and direction an object moves.
*10 m/s south is an example of _____________________.
*Horizontal lines on a velocity/time graph shows _________________ acceleration.
Acceleration:
10. The rate of change of velocity is called ________________________
11. 4 m/s is _____________________acceleration, -4 m/s is _________________ acceleration.
12. *Changing speed from 15 m/s to 10 m/ is ____________________ acceleration.
13. *Riding uphill your acceleration is ____________________, when you go down the other side your acceleration is
then ______________________.
Motion and Force:
14. A push or pull that one body exerts on another. _____________________
15. If the forces are __________________, an object at rest will remain at rest.
16. If the forces are _____________________, an object will move.
17. *The greater an object's __________________ the greater the inertia.
18. A large object is harder to stop than a smaller object at the same speed, because the larger object has a greater
_________.
1. *Newton's second law can be calculated by ____________________
2. According to Newton's second law, the greater the force applied to an object the greater it's __________________
will be.
3. *______________________ is the force that opposes motion between surfaces that touch each other.
4. ________________________ friction is the friction between 2 surfaces that are not moving past each other.
5. *________________________ is the friction that opposes two surfaces sliding past each other.
6. *What force is the downward force on an object falling through the air? ____________________________
7. *The size of two object's gravitational force depends on their ____________________________ and
_____________________________.
8. Acceleration due to gravity is ______________________________.
9. *The gravitational force exerted on an abject is called the object's _______________________________.
10. *The formula for calculating weight: __________________W ______________ m ___________________ g
___________________