Newton’s Third Law states that for every action force, there is an equal and opposite reaction force. Which of the following is the best example of this law?
1 point
1
Question 2
2.
Which of the following correctly describes the relationship between mass, force, and change in speed?
1 point
1
Question 3
3.
Two students push on opposite sides of a box. One pushes with 50 N to the right, and the other pushes with 30 N to the left. What is the total force on the box?
1 point
1
Question 4
4.
Which of the following statements about gravity is true?
Total Force:___________________________________________________________________________________________________________________________________
Other Answer Choices:
Cause change in speed.
The force that pulls massive objects toward each other.
Allow objects to remain still or maintain the same speed.
Adding the individual forces in one direction and subtracting the individual forces in the opposite direction gives you the...
A force that happens between surfaces and oppose motion.
2 points
2
Question 7
7.
A student pulls a 10 kg wagon with a force of 30 N. A second student pulls a 15 kg wagon with the same force of 30 N. Whose wagon will change its speed more quickly and why?
2 points
2
Question 8
8.
Newton's 3rd law states: "For every action force there is an equal and opposite reaction force."
A student sits on top of a skateboard and holds a weighted ball. When the student throws the ball forward, the student rolls backward.
Identify the action force (which object is pushing on what) and the corresponding reaction force.
2 points
2
Question 9
9.
Imagine you are an astronaut floating in space far from any planets. If you push a wrench away from you, what will happen to your motion and what will happen to the motion of the wrench? Write an explanation based on Newton’s Laws.
1 point
1
Question 10
10.
3 points
3
Question 11
11.
Based on your knowledge of friction force, answer the following question...
Describe one way, other than turning the table on, that the players could have changed the puck to make it glide more easily. Explain why it should work.
1 point
1
Question 12
12.
The plastic straws were placed under the wooden block to...
1 point
1
Question 13
13.
1 point
1
Question 14
14.
Which cart will change speed more quickly?
1 point
1
Question 15
15.
Answer the following questions based on the image.
Part a.
The forces on the object are...
1 point
1
Question 16
16.
Part b.
So, its speed is...
2 points
2
Question 17
17.
Part c.
The total force is equal to _______ Newtons in the _______ direction.
1 point
1
Question 18
18.
Answer the following questions based on the image.
Part a.
The forces on the object are...
1 point
1
Question 19
19.
Part b.
So, its speed is...
2 points
2
Question 20
20.
Part c.
The total force is equal to _______ Newtons in the _______ direction.
1 point
1
Question 21
21.
Answer the following questions based on the image.
Part a.
The forces on the object are...
1 point
1
Question 22
22.
Part b.
So, its speed is...
2 points
2
Question 23
23.
Part c.
The total force is equal to _______
4 points
4
Question 24
24.
A wooden block is pulled on two different surfaces: sandpaper then wax paper. The maximum force of static friction between the block and each surface was recorded for three trials in the table shown.
Using the average values of force for sandpaper and wax paper, sketch a bar graph of Static Friction Force vs. Surface. Label the axes, shade in the bars, and write the numerical values for each bar with units.
2 points
2
Question 25
25.
Given the data and from your bar graph, what can be concluded about the static friction force of the different surfaces? Provide an explanation for this difference using your knowledge of why friction happens.
