II. Net Force Table:
Directions for Set-Up
Before Pressing Go, which way do you think the cart will move? (None, Right, Left)
Why does the cart move that way?
What is the sum & direction of the forces?
(example: 70 Left)
Place 1 small blue guy on the very end of the left rope & 1 small red guy on the very end of the right rope
Before pressing Go, the cart will move to the right. This is because there is a greater net force acting on the cart in the right direction.
The cart moves to the right because the net force acting on it is greater in that direction. The net force is determined by adding up all the individual forces acting on the cart.
Initially, when only one small blue guy is placed on the left rope and one small red guy is placed on the right rope, the sum of the forces is 0. There is no net force acting on the cart, so it remains stationary.
Place the medium blue guy on the very end of the left rope & 1 small red guy on the very end of the right rope
When the medium blue guy is placed on the left rope and one small red guy is placed on the right rope, the sum of the forces is still 0. There is no net force, and the cart remains stationary.
Place the big blue guy on the very end of the left rope & add all 4 of the red guys to the right rope
III. Net Force Questions:
1. If you have an equal amount of force on both sides of the tug of war cart, what happens every time? Explain Why.
Type Answer HERE:
2. A student wanted to investigate changing the mass of a cart that you can push. The student pushed both carts with a force of 200 Newtons. If one cart has a mass of 100kg and the other cart a mass of 50kg, what results would the student expect to see as far as how fast each cart moved in comparison with one another?
Type Answer HERE:
3. A scientist wanted to move a golf ball and a bowling ball to both reach 15 mph. What would the scientist have to do differently for the bowling ball than the golf ball to reach his goal?
Type Answer HERE:
The Moving Man LAB
Instructions: Carefully read the directions to complete the virtual tasks in order. Then answer each of the questions given.
V. The Moving Man Questions:
4. Each time the man stopped and took a break, what happened to the line on the Position-Time Graph (Blue Graph). Explain why.
Type Answer HERE:
5. Each time the man stopped and took a break, what happened to the line on the Velocity-Time Graph (Red Graph). Explain why.
Type Answer HERE:
6. What happened to the line on the Position-Time Graph (Blue Graph) when the man returned to the 0 meters? Explain why.
Type Answer HERE:
7. Now click the reset all button. Now grab the man and move him as slowly as you can till he reaches the house. Notice the graph. Again, click the reset all button. Now grab the man and move him as quickly as you can till he reaches the house. Notice the graph. They should look similar to the following images:
Looking at the Position-Time Graph (Blue Graph), what do you notice about the slope of the lines on each graph? (Hint: Slope is the measure of the steepness of the line. Think about going up a hill. Some have a small slope that is like no big deal to climb. Then there are those that have a huge slope. It’s so steep that your eyes get big and you decide, I’m not doing that.) Explain what you are seeing in the graphs above.
Type Answer HERE:
VI. Analyzing the Data:
8.
Type Answer HERE:
The speed is constant.
The distance remains unchanged.
The direction of motion stays the same.
The speed gradually increases over time.
9.
Type Answer HERE:
The ball’s speed is increasing.
The ball’s speed is decreasing.
The ball’s motion is constant.
The ball’s motion is stopping.
10.
Type Answer HERE:
The object is experiencing acceleration.
The object is moving along a curved path.
The object has a negative acceleration.
The object moves at a constant speed.
11.
Type Answer HERE:
The velocity of the car remains constant throughout the journey.
The change in speed alone causes the velocity of the car to vary.
The change in direction alone causes the velocity of the car to vary.
The velocity of the car changes due to the change in speed and direction.
12. Which graph BEST represents the relationship between velocity and time for an object that accelerates uniformly for 2 seconds, then moves at a constant velocity for 1 second, and finally decelerates for 3 seconds?
Type Answer HERE:
READING & EVIDENCE IN SCIENCE
Instructions: Read the following and then answer the questions, using evidence from the text. Make sure answers use your own words.
Airbags-Science Life Savers
Airbags are safety devices designed to protect vehicle occupants during collisions by reducing the impact forces exerted on their bodies. The fundamental principle behind airbags is the concept of rapid inflation and deflation. When a collision occurs, sensors in the vehicle detect the sudden deceleration and send a signal to the airbag control unit. The control unit then triggers the inflation system.
The inflation system of an airbag consists of a solid-state propellant, typically sodium azide, and a mixture of other chemicals. Upon activation, an electric current passes through the propellant, causing it to rapidly decompose and release nitrogen gas. This gas inflates the airbag in milliseconds, allowing it to cushion the vehicle occupant's forward motion and prevent direct contact with hard surfaces, such as the steering wheel or dashboard. The airbag deflates quickly after inflation to allow the occupant to exit the vehicle safely. The entire process occurs in a fraction of a second, providing a protective barrier and reducing the risk of severe injuries, particularly head and chest injuries, during a collision.
VII. Reading & Evidence Questions:
13. Using the text above, how does an airbag work and why does it have to work so quickly?
Type Answer HERE:
14. How does inertia play a role during a car accident, and what tools are in place to keep us safe?
Type Answer HERE:
Virtual Lab Force and Motion-
Grading Rubric
Scoring Rubric
Points
Net Force Table
3 points
Student completes the Net Force Table with accuracy & detail.
0-2 points
Student did not complete or answer the questions correctly.
/3
Net Force Questions
3 points
Student completes the Net Force Questions with accuracy & detail.
0-2 points
Student did not complete or answer the questions correctly.
/3
The Moving Man Questions
4 points
Student completes the The Moving Man Questions with accuracy & detail.
0-3 points
Student did not complete or answer the questions correctly.
/4
Analyzing the Data
5 points
Student completes the Analyzing the Data section correctly and accurately.
0-4 points
Student did not complete or answer the questions correctly.
/5
Reading & Evidence
2 points
Student read the text prompt and completed each question correctly and accurately.
0-1 points
Student did not complete or answer the questions correctly.
/2
1 answer
2 answers