Vocabulary
What is the force that resists motion between two surfaces in contact?
What is friction?
In one sentence, provide a detailed description of where you are right now.
Answers will vary.
In electrical forces,
Positive charges and positive charges repel/attract?
Negative charges and negative charges repel/attract?
Positive charges and negative charges repel/attract?
What is repel, repel, attract?
When forces go in the same direction, we _______ them
What is add?
What is the length of the path an object travels?
What is distance?
Which factor does NOT affect friction between two surfaces?
a. The roughness of the surfaces.
b. The force pressing the surfaces together.
c. The speed of the object.
d. The type of materials in contact.
A box is being pulled with a force of 40 N to the right while a frictional force of 10 N acts to the left. What is the net force acting on the box, and in which direction?
What is 30 N to the right?
What is the starting point chosen to describe the position of an object?
What is a reference point?
Sometimes you need to use more than one reference direction to describe an object’s position. When you describe position using two directions, you are using...
What is two dimensions?
What is the unit of measurement used to calculate force?
What is Newtons (N)?
Two friends push a box. One pushes with a force of 20 N to the right, and the other pushes with a force of 15 N in the same direction. What is the total force acting on the box?
What is 35 N to the right?
What is the process of changing position?
What is motion?
You are sitting five meters south of your friend and three meters west of the park entrance. Describe your position relative to the park entrance using two dimensions.
What is five meters south and three meters west of the park entrance?
What happens when forces acting on an object are balanced?
What is the object’s motion does not change?
A car travels 50 meters north and then 30 meters south. What is the car’s displacement?
What is 20 meters north?
What is the difference between distance and displacement?
What is distance depends on the path taken, while displacement only considers the starting and ending positions?
What are the three things needed to describe position?
What is direction, distance, and reference point?
What are the four types of forces we discussed in class?
What is frictional, gravitational, electrical, and magnetic force?
A ball is rolled across a smooth surface for 8 meters and then across a rough surface for 3 meters. What is the total distance traveled? What is the displacement if the ball ends up 5 meters from its starting point?
What is Total distance: 11 meters. Displacement: 5 meters